undefinedbehavior.com - dns.ninja

`undefinedbehavior.com`

DNSSEC	⚠️ Not signed
A	74.208.236.237^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
		PTR	`74-208-236-237.elastic-ssl.ui-r.com`
NS	`ns1119.ui-dns.org` ⭐
		A	2001:8d8:fe:53:0:d9a0:5377:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.org`
		A	217.160.83.119^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.org`
NS	`ns1119.ui-dns.biz`
		A	2001:8d8:fe:53:0:d9a0:5177:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.biz`
		A	217.160.81.119^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.biz`
NS	`ns1119.ui-dns.com`
		A	2001:8d8:fe:53:0:d9a0:5277:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.com`
		A	217.160.82.119^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.com`
NS	`ns1119.ui-dns.de`
		A	2607:f1c0:fe:53:185:132:32:119^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1119.ui-dns.de`
		A	217.160.80.119^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1119.ui-dns.de`
MX	`mx00.ionos.com` ⭐
		A	74.208.5.3^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx00.perfora.net`
MX	`mx01.ionos.com` ⭐
		A	74.208.5.21^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx01.perfora.net`
TXT	`v=spf1 include:_spf-us.ionos.com ~all`
SOA	`ns1119.ui-dns.org`hostmaster@1and1.com 2016-07-26 #11

`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=1781395538

Same first word

undefinedbehavior.com

undefinedbehavior.xyz

undefinedbehavior.github.io

DNS History

13 records (7 active, 6 former)

●NSns1119.ui-dns.biz2026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

●NSns1119.ui-dns.com2026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

●NSns1119.ui-dns.de2026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

●NSns1119.ui-dns.org2026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

○NSns57.1and1.com2015-07-01 → 2017-03-20 · 4 obs

● 2015-07-01 10:42:12
● 2017-03-20 18:50:34
○ 2026-02-18 09:04:56
○ 2026-06-14 00:25:44

○NSns58.1and1.com2015-07-01 → 2017-03-20 · 4 obs

● 2015-07-01 10:42:12
● 2017-03-20 18:50:34
○ 2026-02-18 09:04:56
○ 2026-06-14 00:25:44

○MXmx00.1and1.com2015-07-01 → 2017-03-20 · 4 obs

● 2015-07-01 10:42:12
● 2017-03-20 18:50:34
○ 2026-02-18 09:04:56
○ 2026-06-14 00:25:44

●MXmx00.ionos.com2026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

○MXmx01.1and1.com2015-07-01 → 2017-03-20 · 4 obs

● 2015-07-01 10:42:12
● 2017-03-20 18:50:34
○ 2026-02-18 09:04:56
○ 2026-06-14 00:25:44

●MXmx01.ionos.com2026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

○A216.250.121.1022017-03-20 → 2017-03-20 · 4 obs

○ 2016-07-16 04:45:24
● 2017-03-20 18:50:34
○ 2026-02-18 09:04:56
○ 2026-06-14 00:25:44

●A74.208.236.2372026-02-18 → 2026-06-14 · 3 obs

○ 2017-03-20 18:50:34
● 2026-02-18 09:04:56
● 2026-06-14 00:25:44

○A74.208.41.1142015-07-01 → 2016-07-16 · 4 obs

● 2015-07-01 10:42:12
● 2016-07-16 04:45:24
○ 2017-03-20 18:50:34
○ 2026-06-14 00:25:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
undefinedbehavior.com	ns1119.ui-dns.de, ns1119.ui-dns.biz, ns1119.ui-dns.org, ns1119.ui-dns.com	2 records

✅ Authoritative Response

Server:217.160.82.119

NS records: ns1119.ui-dns.de, ns1119.ui-dns.biz, ns1119.ui-dns.org, ns1119.ui-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for undefinedbehavior.com (unsigned zone)

⏱️ Timing

Total: 1109ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`74.208.236.237`
NS	4	`ns1119.ui-dns.de, ns1119.ui-dns.org...`
MX	2	`mx00.ionos.com (pri: 10), mx01.ionos.com (pri: 10)`
TXT	1	`v=spf1 include:_spf-us.ionos.com ~all`
SOA	1	`ns1119.ui-dns.org hostmaster.1and1.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1119.ui-dns.com, ns1119.ui-dns.com)

Analysis

IP Addresses

undefinedbehavior.com resolves to just one IP address, 74.208.236.237.

Two other host names, along with oldtownphoto.com, www.upshare.me and joolam.com, also share IP numbers with undefinedbehavior.com.

Name Servers

undefinedbehavior.com is delegated to four name servers, ns1119.ui-dns.biz, ns1119.ui-dns.com, ns1119.ui-dns.de and ns1119.ui-dns.org.

There is at least partial name server overlap between undefinedbehavior.com and other domains — thecastlesofscotland.co.uk, gorlo.eu, lasercare.info and two more among them.

These name servers regularly appear alongside ns1045.ui-dns.org, ns1108.ui-dns.org, ns1099.ui-dns.biz and 7 other name servers in NS record sets.

All four hostnames — ns1119.ui-dns.biz, ns1119.ui-dns.com, ns1119.ui-dns.de and ns1119.ui-dns.org — resolve to two IP numbers apiece: ns1119.ui-dns.biz to 217.160.81.119 and 2001:8d8:fe:53:0:d9a0:5177:100; ns1119.ui-dns.com to 217.160.82.119 and 2001:8d8:fe:53:0:d9a0:5277:100; ns1119.ui-dns.de to 217.160.80.119 and 2607:f1c0:fe:53:185:132:32:119; ns1119.ui-dns.org to 217.160.83.119 and 2001:8d8:fe:53:0:d9a0:5377:100.

Mail Servers

undefinedbehavior.com is served by two mail servers, mx00.ionos.com and mx01.ionos.com.

Among the domains sharing a mail server setup with undefinedbehavior.com are goc-usla.org, property-referrals.com, strataben.net and two others.

undefinedbehavior.com and a number of other domains — sesa.us, nanosase.com, chairecacis.org and cherrytreepharmacy.com among them — share at least some of the same mail servers.

mx00.ionos.com → 74.208.5.3 and mx01.ionos.com → 74.208.5.21: one IP number per host name.