`houstonlibrary.com`

DNSSEC	⚠️ Not signed
A	3.33.251.168^{🇺🇸 Amazon3.33.240.0/20}
		PTR	`aec037177372cc6cd.awsglobalaccelerator.com`
A	15.197.225.128^{🇺🇸 Amazon15.197.224.0/20}
NS	`ns33.domaincontrol.com` ⭐
		A	2603:5:21a1::11^{🇺🇸 GODADDY-DNS2603:5:21a0::/44}
			PTR	`ns33.domaincontrol.com`
		A	97.74.106.17^{🇺🇸 GODADDY-DNS97.74.106.0/23}
			PTR	`ns33.domaincontrol.com`
NS	`ns34.domaincontrol.com`
		A	2603:5:22a1::11^{🇺🇸 GODADDY-DNS2603:5:22a0::/44}
			PTR	`ns34.domaincontrol.com`
		A	173.201.74.17^{🇺🇸 GODADDY-DNS173.201.74.0/23}
			PTR	`ns34.domaincontrol.com`
MX	`hplcensmtp.houstonlibrary.com` ⭐
		A	204.235.225.53^{🇺🇸 HALAN204.235.225.0/24 City of Houston}
TXT	`v=spf1 ip4:204.235.225.53 ip4:204.235.225.95 include:houstonlibrary.com ~all`
SOA	`ns33.domaincontrol.com`dns@jomax.net 2026-03-07 #3

`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=1774998812

Subdomains

hplcensmtp.houstonlibrary.com

Same first word

houstonlibrary.org

houstonlibrary.com

houstonlibrary.net

Similar names

libraryhouston.com

DNS History

14 records (5 active, 9 former)

○NScyrusoneeadns.houstontx.gov2016-12-30 → 2017-12-09 · 5 obs

○ 2016-04-22 05:29:24
● 2016-12-30 01:07:58
● 2017-12-09 08:26:12
○ 2026-03-10 01:11:44
○ 2026-03-31 23:41:22

○NSfannineadns.houstontx.gov2016-12-30 → 2017-12-09 · 5 obs

○ 2016-04-22 05:29:24
● 2016-12-30 01:07:58
● 2017-12-09 08:26:12
○ 2026-03-10 01:11:44
○ 2026-03-31 23:41:22

○NShplns1.houstonlibrary.org2015-05-27 → 2016-04-22 · 5 obs

● 2015-05-27 19:06:34
○ 2015-10-16 18:11:16
● 2016-04-22 05:29:24
○ 2016-12-30 01:07:58
○ 2026-03-31 23:41:22

○NShplns2.houstonlibrary.org2015-05-27 → 2016-04-22 · 4 obs

● 2015-05-27 19:06:34
● 2016-04-22 05:29:24
○ 2016-12-30 01:07:58
○ 2026-03-31 23:41:22

○NShplns2.hpl.lib.tx.us2016-04-22 → 2016-04-22 · 4 obs

○ 2015-12-14 09:30:34
● 2016-04-22 05:29:24
○ 2016-12-30 01:07:58
○ 2026-03-31 23:41:22

○NShplns3.houstonlibrary.org2015-05-27 → 2016-04-22 · 4 obs

● 2015-05-27 19:06:34
● 2016-04-22 05:29:24
○ 2016-12-30 01:07:58
○ 2026-03-31 23:41:22

○NShplns4.hpl.lib.tx.us2015-05-27 → 2015-12-14 · 4 obs

● 2015-05-27 19:06:34
● 2015-12-14 09:30:34
○ 2016-04-22 05:29:24
○ 2026-03-31 23:41:22

●NSns33.domaincontrol.com2026-03-10 → 2026-03-31 · 3 obs

○ 2017-12-09 08:26:12
● 2026-03-10 01:11:44
● 2026-03-31 23:41:22

●NSns34.domaincontrol.com2026-03-10 → 2026-03-31 · 3 obs

○ 2017-12-09 08:26:12
● 2026-03-10 01:11:44
● 2026-03-31 23:41:22

●MXhplcensmtp.houstonlibrary.com2015-05-27 → 2026-03-31 · 2 obs

● 2015-05-27 19:06:34
● 2026-03-31 23:41:22

○MXhplcensmtp01.houstonlibrary.com2015-05-27 → 2017-12-09 · 7 obs

● 2015-05-27 19:06:34
○ 2015-10-16 18:11:16
○ 2016-04-22 05:29:24
● 2016-12-30 01:07:58
● 2017-12-09 08:26:12
○ 2026-03-10 01:11:44
○ 2026-03-31 23:41:22

●A15.197.225.1282026-03-10 → 2026-03-31 · 3 obs

○ 2017-12-09 08:26:12
● 2026-03-10 01:11:44
● 2026-03-31 23:41:22

○A204.235.225.702015-05-27 → 2017-12-09 · 4 obs

● 2015-05-27 19:06:34
● 2017-12-09 08:26:12
○ 2026-03-10 01:11:44
○ 2026-03-31 23:41:22

●A3.33.251.1682026-03-10 → 2026-03-31 · 3 obs

○ 2017-12-09 08:26:12
● 2026-03-10 01:11:44
● 2026-03-31 23:41:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
houstonlibrary.com	ns33.domaincontrol.com, ns34.domaincontrol.com	4 records

✅ Authoritative Response

Server:173.201.74.17

NS records: ns33.domaincontrol.com, ns34.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for houstonlibrary.com (unsigned zone)

⏱️ Timing

Total: 176ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`15.197.225.128, 3.33.251.168`
NS	2	`ns33.domaincontrol.com, ns34.domaincontrol.com`
MX	1	`hplcensmtp.houstonlibrary.com (pri: 10)`
TXT	1	`v=spf1 ip4:204.235.225.53 ip4:204.235.22`
SOA	1	`ns33.domaincontrol.com dns.jomax.net`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns33.domaincontrol.com, ns33.domaincontrol.com, ns34.domaincontrol.com...)

Analysis

Hierarchy

hplcensmtp.houstonlibrary.com has houstonlibrary.com as its parent.

IP Addresses

houstonlibrary.com points to two IPs: 3.33.251.168 and 15.197.225.128.

Other host names, for instance kh-controls.com, kennamedia.com, bestrvresortsarizona.com, ecoenergycommunity.com and myhomeutilities.com share IP numbers with houstonlibrary.com.

Name Servers

Two name servers ns33.domaincontrol.com and ns34.domaincontrol.com are delegated to houstonlibrary.com.

houstonlibrary.com uses the same name server configuration as other domains, such as badenhomesales.com, lilano.org, rummos.eu, lenspodcast.com and united-calendar.info.

houstonlibrary.com shares some name servers with other domains, for example mashrek.edu.jo.

Host names with two IPs:

ns33.domaincontrol.com points to 2603:5:21a1::11 and 97.74.106.17.

ns34.domaincontrol.com points to 2603:5:22a1::11 and 173.201.74.17.

Mail Servers

houstonlibrary.com is handled by a single mail server, hplcensmtp.houstonlibrary.com.

hplcensmtp.houstonlibrary.com points to one IP number: 204.235.225.53.

houstonlibrary.com - robtex.com