hackmd.io - dns.ninja

`hackmd.io`

DNSSEC	🔒 Signed (DS record present)
A	2406:da14:88d:a100:79a3:5de0:4a56:8747^{🇯🇵 Amazon2406:da14:800::/38 .com, Inc. 605 5th Ave S}
A	2406:da14:88d:a101:77cf:9b96:2a14:3374^{🇯🇵 Amazon2406:da14:800::/38 .com, Inc. 605 5th Ave S}
A	2406:da14:88d:a102:fd:ed76:9638:ba35^{🇯🇵 Amazon2406:da14:800::/38 .com, Inc. 605 5th Ave S}
A	75.2.77.152^{🇺🇸 Amazon75.2.64.0/20}
A	99.83.179.177^{🇺🇸 Amazon99.83.176.0/20}
NS	`ns-221.awsdns-27.com` ⭐
		A	2600:9000:5300:dd00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-221.awsdns-27.com`
		A	205.251.192.221^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-221.awsdns-27.com`
NS	`ns-1444.awsdns-52.org`
		A	2600:9000:5305:a400::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1444.awsdns-52.org`
		A	205.251.197.164^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1444.awsdns-52.org`
NS	`ns-1925.awsdns-48.co.uk`
		A	2600:9000:5307:8500::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1925.awsdns-48.co.uk`
		A	205.251.199.133^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1925.awsdns-48.co.uk`
NS	`ns-845.awsdns-41.net`
		A	2600:9000:5303:4d00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-845.awsdns-41.net`
		A	205.251.195.77^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-845.awsdns-41.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c06::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bg-in-f26.1e100.net`
		A	173.194.45.27^{🇺🇸 Google173.194.0.0/16}
			PTR	`yuiadum-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`1password-site-verification=57QCQRGM55BBXPSVY7HZ2PLKJ4`
TXT	`MS=ms17207355`
TXT	`apple-domain-verification=HnlQ3AxJK6XOBK37`
TXT	`bw=8qGCJqfuH16sCug6AQzGtfUnzPCoeYlw2CtDDqrVUlQE`
TXT	`cursor-domain-verification-2jk9c4=aMLb6LeKrCxC5zZDxaO6YViu0`
TXT	`google-site-verification=4C6HQbZYXANAOkpGxSjVMQ5Y2rnkxnDKI5foWeuv5tU`
TXT	`google-site-verification=Yr_Bo_yeVoZeSEPkuJe4pugd0xb7gNecEcm0VauL3Xc`
TXT	`google-site-verification=d-uL-RwYIwGp2juReXK632sSBTtVCCKWghWmt2fC05s`
TXT	`linkedin-site-verification=5d31432e-bc68-4ef3-9cee-139129f957b4`
TXT	`v=spf1 include:amazonses.com include:zoho.com include:servers.mcsv.net includ...`
SOA	`ns-221.awsdns-27.com`awsdns-hostmaster@amazon.com serial=1

`io`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.nic.io` ⭐
	NS	`a2.nic.io`
	NS	`b0.nic.io`
	NS	`c0.nic.io`
	SOA	`a0.nic.io`hostmaster@donuts.email serial=1782552141

rank #3087 globally
rank #27 in the tld

hackmd.io

hackmd.io is a web‑based real‑time collaborative Markdown editor operated by HackMD, a private company based in Taipei, Taiwan.

Key facts

Owner / operator: HackMD (private company)
TLD:.io— ccTLD (British Indian Ocean Territory)
Primary purpose: collaborative Markdown editing and note‑taking platform
Status: active

History

Year	Event
2015	HackMD was founded as an open‑source collaborative Markdown tool.
2017	The commercial entity behind hackmd.io was incorporated, separating it from the community version.
2020	The open‑source counterpart was rebranded to HedgeDoc, distinguishing it from the commercial service.

🔒 HSTS Preload (+subdomains)
WOT: SAFE (76/100)
📈 Tranco rank: #11,189

Subdomains

uploads-public.hackmd.io

www.hackmd.io

tracks.hackmd.io

assets.hackmd.io

g0v.hackmd.io

Same first word

hackmd.org

hackmd.io

hackmd.dev

hackmd.net

hackmd.com

Similar names

kchadm.ru

chkadm.kasserver.com

ahkmdc.com

camhdk.com

dhcmak.com

amdchk.com

mackhd.com

dachkm.org

kamdch.blogspot.com

chkadm.ru

mkdach.pl

DNS History

87 records (14 active, 73 former)

●NSns-1444.awsdns-52.org2017-06-24 → 2026-06-27 · 3 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2026-06-27 10:09:06

●NSns-1925.awsdns-48.co.uk2017-06-24 → 2026-06-27 · 3 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2026-06-27 10:09:06

●NSns-221.awsdns-27.com2017-06-24 → 2026-06-27 · 3 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2026-06-27 10:09:06

●NSns-845.awsdns-41.net2017-06-24 → 2026-06-27 · 3 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2026-06-27 10:09:06

○NSns1.linode.com2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○NSns2.linode.com2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○NSns3.linode.com2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○NSns4.linode.com2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○NSns5.linode.com2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

●MXalt1.aspmx.l.google.com2026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

●MXalt2.aspmx.l.google.com2026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

●MXalt3.aspmx.l.google.com2026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

●MXalt4.aspmx.l.google.com2026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

●MXaspmx.l.google.com2026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

○MXinbound-smtp.us-east-1.amazonaws.com2017-06-24 → 2018-09-28 · 5 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2018-09-28 07:19:58
○ 2021-04-22 21:27:52
○ 2026-06-27 10:09:06

○MXmail.hackmd.io2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○MXmx.zoho.com2021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○MXmx2.zoho.com2021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○MXmx3.zoho.com2021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○A13.113.141.362018-09-17 → 2018-09-17 · 4 obs

○ 2018-09-15 21:44:36
● 2018-09-17 22:56:54
○ 2018-09-28 07:19:58
○ 2026-06-27 10:09:06

○A13.114.49.1192018-09-15 → 2018-09-17 · 5 obs

○ 2018-09-08 09:09:24
● 2018-09-15 21:44:36
● 2018-09-17 22:56:54
○ 2018-09-28 07:19:58
○ 2026-06-27 10:09:06

○A139.162.89.912016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○A18.177.158.2332021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○A18.182.252.2422018-09-28 → 2018-09-28 · 4 obs

○ 2018-09-17 22:56:54
● 2018-09-28 07:19:58
○ 2021-04-22 21:27:52
○ 2026-06-27 10:09:06

○A2400:8902::f03c:91ff:fee0:673b2016-12-05 → 2017-02-16 · 4 obs

● 2016-12-05 00:32:02
● 2017-02-16 08:23:36
○ 2017-06-24 11:20:26
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:2abe:94cb:84c6:5bd62021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:30bb:9a87:1c24:24952026-05-30 → 2026-05-30 · 4 obs

○ 2026-05-26 22:32:40
● 2026-05-30 19:33:22
○ 2026-06-05 11:41:56
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:3818:5fb7:c7cd:8c192026-04-27 → 2026-04-30 · 5 obs

○ 2026-04-19 05:11:34
● 2026-04-27 15:20:28
● 2026-04-30 23:33:56
○ 2026-05-04 16:02:30
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:3a99:44:681a:42db2026-02-17 → 2026-06-27 · 2 obs

○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:443e:731:1ff3:28302026-05-26 → 2026-05-26 · 4 obs

○ 2026-05-05 18:04:50
● 2026-05-26 22:32:40
○ 2026-05-30 19:33:22
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:465c:d189:7056:68a92026-06-15 → 2026-06-18 · 5 obs

○ 2026-06-05 11:41:56
● 2026-06-15 10:17:02
● 2026-06-18 06:00:10
○ 2026-06-26 18:46:58
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:4762:cada:61bf:1ec42026-03-25 → 2026-03-25 · 4 obs

○ 2026-02-22 18:57:58
● 2026-03-25 09:22:52
○ 2026-04-06 09:03:00
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:5aab:2b84:19a4:dd752018-09-15 → 2018-09-17 · 5 obs

○ 2018-09-08 09:09:24
● 2018-09-15 21:44:36
● 2018-09-17 22:56:54
○ 2018-09-28 07:19:58
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:5be:75ae:dc13:c6c22026-04-06 → 2026-04-07 · 5 obs

○ 2026-03-25 09:22:52
● 2026-04-06 09:03:00
● 2026-04-07 16:58:22
○ 2026-04-19 01:44:02
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:69c:db5b:9a07:b98f2018-09-08 → 2018-09-08 · 4 obs

○ 2017-09-23 05:20:20
● 2018-09-08 09:09:24
○ 2018-09-15 21:44:36
○ 2026-06-27 10:09:06

●A2406:da14:88d:a100:79a3:5de0:4a56:87472026-06-27 → 2026-06-27 · 3 obs

○ 2026-06-26 18:46:58
● 2026-06-27 01:34:58
● 2026-06-27 10:09:06

○A2406:da14:88d:a100:8835:f0c2:a29f:4c902026-04-19 → 2026-04-19 · 5 obs

○ 2026-04-07 16:58:22
● 2026-04-19 01:44:02
● 2026-04-19 05:11:34
○ 2026-04-27 15:20:28
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:b57b:1fe1:3d52:6c8f2026-02-17 → 2026-02-22 · 5 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-02-22 18:57:58
○ 2026-03-25 09:22:52
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:c037:8490:61bf:6d972026-06-05 → 2026-06-05 · 4 obs

○ 2026-05-30 19:33:22
● 2026-06-05 11:41:56
○ 2026-06-15 10:17:02
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:c428:ff89:6e3f:67db2026-06-26 → 2026-06-26 · 4 obs

○ 2026-06-18 06:00:10
● 2026-06-26 18:46:58
○ 2026-06-27 01:34:58
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:d114:2709:bf20:d6912018-09-28 → 2018-09-28 · 4 obs

○ 2018-09-17 22:56:54
● 2018-09-28 07:19:58
○ 2021-04-22 21:27:52
○ 2026-06-27 10:09:06

○A2406:da14:88d:a100:d325:7785:ff29:50272026-05-04 → 2026-05-05 · 5 obs

○ 2026-04-30 23:33:56
● 2026-05-04 16:02:30
● 2026-05-05 18:04:50
○ 2026-05-26 22:32:40
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:144b:ab4a:799a:ea52026-04-30 → 2026-04-30 · 5 obs

○ 2026-04-28 01:41:32
● 2026-04-30 05:36:34
● 2026-04-30 23:33:56
○ 2026-05-04 16:02:30
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:2245:2c62:944d:dba12018-09-17 → 2018-09-17 · 4 obs

○ 2018-09-15 21:44:36
● 2018-09-17 22:56:54
○ 2018-09-28 07:19:58
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:2c52:56a:76ea:91bf2026-04-07 → 2026-04-07 · 4 obs

○ 2026-04-06 09:03:00
● 2026-04-07 16:58:22
○ 2026-04-19 01:44:02
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:5bf2:20c8:74c:dff32026-03-25 → 2026-03-25 · 4 obs

○ 2026-02-22 18:57:58
● 2026-03-25 09:22:52
○ 2026-04-06 09:03:00
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:5d71:bd7a:6c42:a8c62026-06-05 → 2026-06-05 · 4 obs

○ 2026-05-30 19:33:22
● 2026-06-05 11:41:56
○ 2026-06-15 10:17:02
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:5fa7:d150:a56f:7a4c2018-09-08 → 2018-09-08 · 4 obs

○ 2017-09-23 05:20:20
● 2018-09-08 09:09:24
○ 2018-09-15 21:44:36
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:60d1:3134:2bb7:8f002026-04-19 → 2026-04-19 · 5 obs

○ 2026-04-07 16:58:22
● 2026-04-19 01:44:02
● 2026-04-19 05:11:34
○ 2026-04-27 15:20:28
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:6b5:5e7:31ca:86bb2021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:7186:6910:501e:4e822026-06-18 → 2026-06-18 · 4 obs

○ 2026-06-15 10:17:02
● 2026-06-18 06:00:10
○ 2026-06-26 18:46:58
○ 2026-06-27 10:09:06

●A2406:da14:88d:a101:77cf:9b96:2a14:33742026-06-26 → 2026-06-27 · 3 obs

○ 2026-06-18 06:00:10
● 2026-06-26 18:46:58
● 2026-06-27 10:09:06

○A2406:da14:88d:a101:9c0c:d1a7:b8fd:42bf2026-02-17 → 2026-06-27 · 2 obs

○ 2026-02-17 10:52:44
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:9ece:4dba:7c1e:18ef2026-05-26 → 2026-05-30 · 5 obs

○ 2026-05-05 18:04:50
● 2026-05-26 22:32:40
● 2026-05-30 19:33:22
○ 2026-06-05 11:41:56
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:bfa5:2f52:e30:294e2026-04-06 → 2026-04-06 · 4 obs

○ 2026-03-25 09:22:52
● 2026-04-06 09:03:00
○ 2026-04-07 16:58:22
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:c66c:5e12:8b4c:9e642026-05-04 → 2026-05-05 · 5 obs

○ 2026-04-30 23:33:56
● 2026-05-04 16:02:30
● 2026-05-05 18:04:50
○ 2026-05-26 22:32:40
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:d7c5:da27:497c:b1372026-04-27 → 2026-04-28 · 5 obs

○ 2026-04-19 05:11:34
● 2026-04-27 15:20:28
● 2026-04-28 01:41:32
○ 2026-04-30 05:36:34
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:d932:b238:869e:551d2018-09-15 → 2018-09-15 · 4 obs

○ 2018-09-08 09:09:24
● 2018-09-15 21:44:36
○ 2018-09-17 22:56:54
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:dbe0:5949:b675:4b5d2026-02-17 → 2026-02-22 · 5 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-02-22 18:57:58
○ 2026-03-25 09:22:52
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:f492:925f:311d:b6f82018-09-28 → 2018-09-28 · 4 obs

○ 2018-09-17 22:56:54
● 2018-09-28 07:19:58
○ 2021-04-22 21:27:52
○ 2026-06-27 10:09:06

○A2406:da14:88d:a101:fda0:167:8af:fb0a2026-06-15 → 2026-06-15 · 4 obs

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○A2406:da14:88d:a102:1eaf:9af:3b14:dc6f2026-02-20 → 2026-02-20 · 5 obs

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○A2406:da14:88d:a102:2226:ba9a:7be5:cedc2026-04-27 → 2026-04-28 · 5 obs

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○A2406:da14:88d:a102:2bbf:664e:343a:64fa2021-04-22 → 2021-04-22 · 4 obs

○ 2018-09-28 07:19:58
● 2021-04-22 21:27:52
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○A2406:da14:88d:a102:3bec:e626:eea1:5d802026-04-30 → 2026-04-30 · 5 obs

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○A2406:da14:88d:a102:482d:a633:3c7:a9892026-04-06 → 2026-04-07 · 5 obs

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○A2406:da14:88d:a102:56b3:dfca:5b6f:84e42026-05-26 → 2026-06-05 · 5 obs

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○A2406:da14:88d:a102:8c98:2abc:ee91:34782026-02-17 → 2026-02-17 · 4 obs

○ 2021-04-22 21:27:52
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○A2406:da14:88d:a102:8d42:30e8:1c35:27eb2026-04-19 → 2026-04-19 · 5 obs

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○A2406:da14:88d:a102:9a5e:5a2f:86c0:f8c2026-05-04 → 2026-05-05 · 5 obs

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○A2406:da14:88d:a102:d011:214e:e406:22f62026-06-15 → 2026-06-18 · 5 obs

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○A2406:da14:88d:a102:d297:8f9:f5d:57a72026-02-21 → 2026-02-22 · 5 obs

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○A2406:da14:88d:a102:da17:1964:baff:cc602026-02-22 → 2026-02-22 · 4 obs

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○A2406:da14:88d:a102:e342:7da3:56f0:44dd2026-02-17 → 2026-06-27 · 2 obs

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○A2406:da14:88d:a102:ec36:4a55:5827:a4e32026-03-25 → 2026-03-25 · 4 obs

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●A2406:da14:88d:a102:fd:ed76:9638:ba352026-06-26 → 2026-06-27 · 3 obs

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○A52.192.197.1872017-06-24 → 2017-07-17 · 5 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2017-07-17 17:04:46
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○A52.192.51.332018-09-08 → 2018-09-15 · 5 obs

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● 2018-09-08 09:09:24
● 2018-09-15 21:44:36
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○A52.193.103.762017-09-23 → 2017-09-23 · 4 obs

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● 2017-09-23 05:20:20
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○A52.193.136.62017-09-23 → 2017-09-23 · 4 obs

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○A52.194.68.2252018-09-28 → 2018-09-28 · 4 obs

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● 2018-09-28 07:19:58
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○A52.197.171.1902018-09-08 → 2018-09-08 · 4 obs

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● 2018-09-08 09:09:24
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○A52.199.177.1902021-04-22 → 2021-04-22 · 4 obs

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● 2021-04-22 21:27:52
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○A54.150.45.442021-04-22 → 2021-04-22 · 4 obs

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● 2021-04-22 21:27:52
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○A54.64.219.982017-06-24 → 2017-07-17 · 5 obs

○ 2017-02-16 08:23:36
● 2017-06-24 11:20:26
● 2017-07-17 17:04:46
○ 2017-09-23 05:20:20
○ 2026-06-27 10:09:06

●A75.2.77.1522026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

●A99.83.179.1772026-02-17 → 2026-06-27 · 3 obs

○ 2021-04-22 21:27:52
● 2026-02-17 10:52:44
● 2026-06-27 10:09:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	b0.nic.io, a2.nic.io, a0.nic.io, c0.nic.io	-
hackmd.io	ns-1444.awsdns-52.org, ns-1925.awsdns-48.co.uk, ns-221.awsdns-27.com, ns-845.awsdns-41.net	-

✅ Authoritative Response

Server:205.251.199.133

NS records: ns-1444.awsdns-52.org, ns-1925.awsdns-48.co.uk, ns-221.awsdns-27.com, ns-845.awsdns-41.net

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 698ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`75.2.77.152, 99.83.179.177`
AAAA	3	`2406:da14:88d:a100:79a3:5de0:4a56:8747, 2406:da14:88d:a101:77cf:9b96:2a14:3374...`
NS	4	`ns-1444.awsdns-52.org, ns-1925.awsdns-48.co.uk...`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	10	`1password-site-verification=57QCQRGM55BB, MS=ms17207355...`
SOA	1	`ns-221.awsdns-27.com awsdns-hostmaster.a`

Analysis

Hierarchy

uploads-public.hackmd.io, www.hackmd.io, tracks.hackmd.io, assets.hackmd.io and g0v.hackmd.io are all subdomains of hackmd.io.

IP Addresses

hackmd.io points to five IP addresses: 75.2.77.152, 99.83.179.177, 2406:da14:88d:a100:79a3:5de0:4a56:8747 and two more

Host names like a865a9e11bc2c0d65.awsglobalaccelerator.com are further examples that share IP numbers with hackmd.io.

Name Servers

The authoritative name servers for hackmd.io are ns-221.awsdns-27.com, ns-845.awsdns-41.net, ns-1444.awsdns-52.org and ns-1925.awsdns-48.co.uk.

The name servers of hackmd.io overlap at least partially with those of other domains — among them redline-software.com, dev.rallyrd.com, fasa.ind.br and two more.

Each of the four hosts ns-221.awsdns-27.com, ns-845.awsdns-41.net, ns-1444.awsdns-52.org and ns-1925.awsdns-48.co.uk has two IP addresses. ns-221.awsdns-27.com points to 205.251.192.221 and 2600:9000:5300:dd00::1. ns-845.awsdns-41.net points to 205.251.195.77 and 2600:9000:5303:4d00::1. ns-1444.awsdns-52.org points to 205.251.197.164 and 2600:9000:5305:a400::1. ns-1925.awsdns-48.co.uk points to 205.251.199.133 and 2600:9000:5307:8500::1.

Mail Servers

Five mail servers handle hackmd.io: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

hackmd.io has at least partial mail server overlap with other domains such as ns500698.ns500698.ns500758.ns500758.ns500758.ns500735.ns500735.ns500736.ns500736.ns500698.ns500708.ns500698.ns500708.trackreceptor.com, ns500754.ns500671.ns500671.ns500742.ns500731.ns500671.ns500731.ns500671.ns500688.ns500291.ns500291.ns500666.tenderladiesbz.com, ns500693.ns500734.ns500734.ns500699.ns500699.ns500699.ns500734.ns500699.ns500693.ns500588.ns500699.ns500699.ns500693.dtrkdll.com and two more.

These mail servers commonly co-occur with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 others.

Hostnames that resolve to two IP addresses:

aspmx.l.google.com resolves to two addresses: 173.194.45.27 and 2607:f8b0:4004:c06::1a.

alt1.aspmx.l.google.com resolves to two addresses: 108.177.123.26 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com resolves to two addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com resolves to two addresses: 192.178.223.26 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com resolves to two addresses: 172.253.157.26 and 2a00:1450:400c:c23::1b.