rtfd.org - dns.ninja

`rtfd.org`

DNSSEC	⚠️ Not signed
A	2606:4700::6810:fd78^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	2606:4700::6810:fe78^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.16.253.120^{Cloudflare104.16.240.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.16.254.120^{Cloudflare104.16.240.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ivan.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b78^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c178^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ivan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2178^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ivan.ns.cloudflare.com`
		A	108.162.193.120^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivan.ns.cloudflare.com`
		A	172.64.33.120^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivan.ns.cloudflare.com`
		A	173.245.59.120^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivan.ns.cloudflare.com`
NS	`tegan.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ae2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0e2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tegan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20e2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tegan.ns.cloudflare.com`
		A	108.162.192.226^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
		A	172.64.32.226^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
		A	173.245.58.226^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c21::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`pe-in-f27.1e100.net`
		A	192.178.218.26^{🇺🇸 Google192.178.218.0/24}
			PTR	`yuiadtq-in-f26.1e100.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::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
SOA	`ivan.ns.cloudflare.com`dns@cloudflare.com serial=2409855441

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1784815732

rank #461163 globally
rank #35538 in the tld

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DNS History

25 records (11 active, 14 former)

○NSa.ns.rtfd.org2007-08-22 → 2007-08-22 · 3 obs

● 2007-08-22 20:26:08
○ 2015-06-04 08:04:32
○ 2026-07-23 14:36:20

○NSb.ns.rtfd.org2007-08-22 → 2007-08-22 · 3 obs

● 2007-08-22 20:26:08
○ 2015-06-04 08:04:32
○ 2026-07-23 14:36:20

○NSdns1.stabletransit.com2015-06-04 → 2017-05-23 · 5 obs

○ 2007-08-22 20:26:08
● 2015-06-04 08:04:32
● 2017-05-23 15:16:34
○ 2021-06-07 12:46:36
○ 2026-07-23 14:36:20

○NSdns2.stabletransit.com2015-06-04 → 2017-05-23 · 5 obs

○ 2007-08-22 20:26:08
● 2015-06-04 08:04:32
● 2017-05-23 15:16:34
○ 2021-06-07 12:46:36
○ 2026-07-23 14:36:20

●NSivan.ns.cloudflare.com2021-06-07 → 2026-07-23 · 3 obs

○ 2017-05-23 15:16:34
● 2021-06-07 12:46:36
● 2026-07-23 14:36:20

○NSns.rackspace.com2015-06-04 → 2017-05-23 · 5 obs

○ 2007-08-22 20:26:08
● 2015-06-04 08:04:32
● 2017-05-23 15:16:34
○ 2021-06-07 12:46:36
○ 2026-07-23 14:36:20

●NStegan.ns.cloudflare.com2021-06-07 → 2026-07-23 · 3 obs

○ 2017-05-23 15:16:34
● 2021-06-07 12:46:36
● 2026-07-23 14:36:20

●MXalt1.aspmx.l.google.com2015-11-11 → 2026-07-23 · 3 obs

○ 2015-06-04 08:04:32
● 2015-11-11 10:13:58
● 2026-07-23 14:36:20

●MXalt2.aspmx.l.google.com2015-11-11 → 2026-07-23 · 3 obs

○ 2015-06-04 08:04:32
● 2015-11-11 10:13:58
● 2026-07-23 14:36:20

○MXalt3.aspmx.l.google.com2015-11-11 → 2021-06-07 · 5 obs

○ 2015-06-04 08:04:32
● 2015-11-11 10:13:58
● 2021-06-07 12:46:36
○ 2026-03-20 20:51:52
○ 2026-07-23 14:36:20

○MXalt4.aspmx.l.google.com2015-11-11 → 2021-06-07 · 5 obs

○ 2015-06-04 08:04:32
● 2015-11-11 10:13:58
● 2021-06-07 12:46:36
○ 2026-03-20 20:51:52
○ 2026-07-23 14:36:20

●MXaspmx.l.google.com2015-11-11 → 2026-07-23 · 3 obs

○ 2015-06-04 08:04:32
● 2015-11-11 10:13:58
● 2026-07-23 14:36:20

●MXaspmx2.googlemail.com2026-03-20 → 2026-07-23 · 3 obs

○ 2021-06-07 12:46:36
● 2026-03-20 20:51:52
● 2026-07-23 14:36:20

●MXaspmx3.googlemail.com2026-03-20 → 2026-07-23 · 3 obs

○ 2021-06-07 12:46:36
● 2026-03-20 20:51:52
● 2026-07-23 14:36:20

○MXmail.sonzogni.com2007-08-22 → 2007-08-22 · 3 obs

● 2007-08-22 20:26:08
○ 2015-06-04 08:04:32
○ 2026-07-23 14:36:20

●A104.16.253.1202026-03-20 → 2026-07-23 · 3 obs

○ 2021-06-07 12:46:36
● 2026-03-20 20:51:52
● 2026-07-23 14:36:20

●A104.16.254.1202026-03-20 → 2026-07-23 · 3 obs

○ 2021-06-07 12:46:36
● 2026-03-20 20:51:52
● 2026-07-23 14:36:20

○A104.17.32.822021-06-07 → 2021-06-07 · 4 obs

○ 2017-05-23 15:16:34
● 2021-06-07 12:46:36
○ 2026-03-20 20:51:52
○ 2026-07-23 14:36:20

○A104.17.33.822021-06-07 → 2021-06-07 · 4 obs

○ 2017-05-23 15:16:34
● 2021-06-07 12:46:36
○ 2026-03-20 20:51:52
○ 2026-07-23 14:36:20

○A162.209.114.752015-06-04 → 2017-05-23 · 5 obs

○ 2007-08-22 20:26:08
● 2015-06-04 08:04:32
● 2017-05-23 15:16:34
○ 2021-06-07 12:46:36
○ 2026-07-23 14:36:20

●A2606:4700::6810:fd782026-03-20 → 2026-07-23 · 3 obs

○ 2021-06-07 12:46:36
● 2026-03-20 20:51:52
● 2026-07-23 14:36:20

●A2606:4700::6810:fe782026-03-20 → 2026-07-23 · 3 obs

○ 2021-06-07 12:46:36
● 2026-03-20 20:51:52
● 2026-07-23 14:36:20

○A2606:4700::6811:20522021-06-07 → 2021-06-07 · 4 obs

○ 2017-05-23 15:16:34
● 2021-06-07 12:46:36
○ 2026-03-20 20:51:52
○ 2026-07-23 14:36:20

○A2606:4700::6811:21522021-06-07 → 2021-06-07 · 4 obs

○ 2017-05-23 15:16:34
● 2021-06-07 12:46:36
○ 2026-03-20 20:51:52
○ 2026-07-23 14:36:20

○A66.246.120.742007-08-22 → 2007-08-22 · 3 obs

● 2007-08-22 20:26:08
○ 2015-06-04 08:04:32
○ 2026-07-23 14:36:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
rtfd.org	ivan.ns.cloudflare.com, tegan.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.226

NS records: ivan.ns.cloudflare.com, tegan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtfd.org (unsigned zone)

⏱️ Timing

Total: 658ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.16.254.120, 104.16.253.120`
AAAA	2	`2606:4700::6810:fe78, 2606:4700::6810:fd78`
NS	2	`ivan.ns.cloudflare.com, tegan.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
SOA	1	`ivan.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

rtfd.org directs to four IP numbers, which are 104.16.253.120, 104.16.254.120, 2606:4700::6810:fd78 and 2606:4700::6810:fe78.

Additional host names — django-autoslug.readthedocs.io, gpflowopt.readthedocs.io, kahlan.readthedocs.io and two others — share IP numbers with rtfd.org.

Name Servers

The NS records for rtfd.org delegate to ivan.ns.cloudflare.com and tegan.ns.cloudflare.com.

rtfd.org shares its name server setup with other domains, including delta-v.co, bmbbqorders.com, pkk-egrp365.ru and two others.

At least some of rtfd.org's name servers are shared with other domains, for example networksecuritygroup.com, jiuzhangsuanfa.cn, notshop-pl.com and two more.

It is common for these name servers to be used in conjunction with the name servers mustafa.ns.cloudflare.com, erin.ns.cloudflare.com and dora.ns.cloudflare.com.

Host names with 6 IP numbers:

ivan.ns.cloudflare.com maps to 108.162.193.120, 172.64.33.120, 173.245.59.120 and 3 additional IP addresses.

tegan.ns.cloudflare.com maps to 108.162.192.226, 172.64.32.226, 173.245.58.226 and 3 additional IP addresses.

Mail Servers

Five mail servers handle rtfd.org: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.

rtfd.org shares mail servers — at least in part — with other domains, including asmas.sg, ns500671.ns500731.ns500742.ns500742.ns500754.ns500731.ns500688.ns500688.ns500671.ns500678.ns500678.ns500671.lusty(0x736c7574)z.com, ns500759.ns500758.ns500698.ns500759.ns500735.ns500736.ns500735.ns500698.ns500735.ns500576.ns500698.ns500619.ns500576.ns500619.trackreceptor.com and two others.

These mail servers are frequently used alongside mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 other.

Host names with two IP numbers:

The A records for aspmx2.googlemail.com return 108.177.123.26 and 2800:3f0:4003:c0f::1b.

The A records for aspmx3.googlemail.com return 172.253.116.27 and 2a00:1450:400b:c02::1a.

The A records for aspmx.l.google.com return 192.178.218.26 and 2607:f8b0:4004:c21::1b.

The A records for alt1.aspmx.l.google.com return 108.177.123.26 and 2800:3f0:4003:c0f::1a.

The A records for alt2.aspmx.l.google.com return 172.253.116.27 and 2a00:1450:400b:c02::1a.

aspmx2.googlemail.com and alt1.aspmx.l.google.com each have 108.177.123.26 IP addresses.

aspmx3.googlemail.com and alt2.aspmx.l.google.com each have 2a00:1450:400b:c02::1a IP addresses.

aspmx3.googlemail.com and alt2.aspmx.l.google.com each have 172.253.116.27 IP addresses.