arithmeticoverflow.com - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`arithmeticoverflow.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::6815:2757^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:aa18^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.39.87^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.170.24^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`princess.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2611^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`princess.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c211^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`princess.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2211^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`princess.ns.cloudflare.com`
		A	108.162.194.17^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`princess.ns.cloudflare.com`
		A	162.159.38.17^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`princess.ns.cloudflare.com`
		A	172.64.34.17^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`princess.ns.cloudflare.com`
NS	`sean.ns.cloudflare.com`
		A	2606:4700:58::adf5:3be7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1e7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sean.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21e7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sean.ns.cloudflare.com`
		A	108.162.193.231^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
		A	172.64.33.231^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
		A	173.245.59.231^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
MX	`_dc-mx.55b811c112c6.arithmeticoverflow.com` ⭐
		A	2401:2500:102:3015:153:126:159:131^{🇯🇵 SAKURA-A2401:2500::/32 (ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan}
			PTR	`153.126.159.131.v6.sakura.ne.jp`
		A	153.126.159.131^{🇯🇵 SAKURA-A153.126.128.0/17 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
			PTR	`ik1-315-17877.vs.sakura.ne.jp`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.39.87, 172.67.170.24
		IPv6 hints	2606:4700:3030::6815:2757, 2606:4700:3037::ac43:aa18
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=105, name=cloudflare-ech.com
SOA	`princess.ns.cloudflare.com`dns@cloudflare.com serial=2411834139

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1786843719

Previously MX for

arithmeticoverflow.com

Same first word

arithmeticoverflow.com

DNS History

14 records (7 active, 7 former)

○NSmaster.dns.ne.jp2018-05-12 → 2018-05-12 · 3 obs

● 2018-05-12 13:34:54
○ 2026-02-15 10:03:12
○ 2026-08-16 01:43:48

○NSns1.dns.ne.jp2018-05-12 → 2018-05-12 · 3 obs

● 2018-05-12 13:34:54
○ 2026-02-15 10:03:12
○ 2026-08-16 01:43:48

○NSns2.dns.ne.jp2018-05-12 → 2018-05-12 · 3 obs

● 2018-05-12 13:34:54
○ 2026-02-15 10:03:12
○ 2026-08-16 01:43:48

●NSprincess.ns.cloudflare.com2026-02-15 → 2026-08-16 · 3 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-08-16 01:43:48

●NSsean.ns.cloudflare.com2026-02-15 → 2026-08-16 · 3 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-08-16 01:43:48

●MX_dc-mx.55b811c112c6.arithmeticoverflow.com2026-02-15 → 2026-08-16 · 3 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-08-16 01:43:48

○MXarithmeticoverflow.com2018-05-12 → 2018-05-12 · 3 obs

● 2018-05-12 13:34:54
○ 2026-02-15 10:03:12
○ 2026-08-16 01:43:48

●A104.21.39.872026-02-15 → 2026-08-16 · 3 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-08-16 01:43:48

○A153.126.159.1312018-05-12 → 2018-05-12 · 3 obs

● 2018-05-12 13:34:54
○ 2026-02-15 10:03:12
○ 2026-08-16 01:43:48

●A172.67.170.242026-02-15 → 2026-08-16 · 3 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-08-16 01:43:48

●A2606:4700:3030::6815:27572026-06-30 → 2026-08-16 · 3 obs

○ 2026-05-25 13:45:24
● 2026-06-30 04:07:40
● 2026-08-16 01:43:48

○A2606:4700:3030::ac43:aa182026-02-15 → 2026-05-25 · 5 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-05-25 13:45:24
○ 2026-06-30 04:07:40
○ 2026-08-16 01:43:48

○A2606:4700:3031::6815:27572026-02-15 → 2026-05-25 · 5 obs

○ 2018-05-12 13:34:54
● 2026-02-15 10:03:12
● 2026-05-25 13:45:24
○ 2026-06-30 04:07:40
○ 2026-08-16 01:43:48

●A2606:4700:3037::ac43:aa182026-06-30 → 2026-08-16 · 3 obs

○ 2026-05-25 13:45:24
● 2026-06-30 04:07:40
● 2026-08-16 01:43:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
arithmeticoverflow.com	sean.ns.cloudflare.com, princess.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.17

NS records: sean.ns.cloudflare.com, princess.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for arithmeticoverflow.com (unsigned zone)

⏱️ Timing

Total: 172ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.170.24, 104.21.39.87`
AAAA	2	`2606:4700:3030::6815:2757, 2606:4700:3037::ac43:aa18`
NS	2	`princess.ns.cloudflare.com, sean.ns.cloudflare.com`
MX	1	`_dc-mx.55b811c112c6.arithmeticoverflow.c`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`princess.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (sean.ns.cloudflare.com, sean.ns.cloudflare.com, sean.ns.cloudflare.com...)

Analysis

IP Addresses

arithmeticoverflow.com points to the four IP addresses 104.21.39.87, 172.67.170.24, 2606:4700:3030::6815:2757 and 2606:4700:3037::ac43:aa18.

grinchpizzaelblag.pl, (0x786e7878)new.cc, ermis1877.gr plus two other host names have IP numbers in common with arithmeticoverflow.com.

Name Servers

arithmeticoverflow.com is served by two delegated name servers, princess.ns.cloudflare.com and sean.ns.cloudflare.com.

The name server configuration of arithmeticoverflow.com is shared with other domains, for instance fijifish.com, 525system.com, subinmec.com and two others.

The name servers of arithmeticoverflow.com overlap at least partially with those of other domains — among them pioneermotorinn.com, izoteframeza.click, warluckcoreco.click and two more.

These name servers commonly co-occur with the name servers luciana.ns.cloudflare.com, mark.ns.cloudflare.com, quentin.ns.cloudflare.com and kyrie.ns.cloudflare.com.

Hosts with 6 IP addresses each:

princess.ns.cloudflare.com carries IP addresses 108.162.194.17, 162.159.38.17 and 172.64.34.17, with 3 other addresses beyond those.

sean.ns.cloudflare.com carries IP addresses 108.162.193.231, 172.64.33.231 and 173.245.59.231, with 3 other addresses beyond those.

Mail Servers

arithmeticoverflow.com uses one mail server — _dc-mx.55b811c112c6.arithmeticoverflow.com.

_dc-mx.55b811c112c6.arithmeticoverflow.com resolves to two IP numbers — 153.126.159.131 and 2401:2500:102:3015:153:126:159:131.