`cityopensource.com`

DNSSEC	⚠️ Not signed
A	46.252.157.156^{🇮🇹 ASSUPERNOVA46.252.144.0/20 Netsons Network}
		PTR	`hostingssd105-156.netsons.net`
NS	`ns-uk.topdns.com` ⭐
		A	77.247.183.137^{🇳🇱 NFORCE77.247.176.0/21 NFOrce Entertainment BV - route 77.247.176.0/21}
			PTR	`ns-uk.topdns.com`
NS	`ns-canada.topdns.com`
		A	109.201.142.225^{🇳🇱 NFORCE109.201.128.0/19 NFOrce Entertainment BV - 109.201.128.0/19 route}
			PTR	`ns-canada.topdns.com`
NS	`ns-usa.topdns.com`
		A	143.198.68.197^{🇺🇸 DIGITALOCEAN143.198.64.0/20 DigitalOcean}
		A	161.35.225.48^{🇺🇸 DIGITALOCEAN161.35.224.0/20 DigitalOcean}
MX	`mail.cityopensource.com` ⭐
		A	46.252.157.156^{🇮🇹 ASSUPERNOVA46.252.144.0/20 Netsons Network}
			PTR	`hostingssd105-156.netsons.net`
TXT	`google-site-verification=E7ua8Cf5DPShY2onSBCjaO5waXQHE51fUQVE4l1mqzg`
TXT	`v=spf1 +ip4:46.252.157.156 +ip4:89.40.173.98 +include:_spf.google.com ~all`
SOA	`ns-uk.topdns.com`hostmaster@topdns.com 2026-01-26 #1

`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=1774874797

Subdomains

www.cityopensource.com

mail.cityopensource.com

Same first word

cityopensource.com

DNS History

11 records (5 active, 6 former)

●NSns-canada.topdns.com2016-02-27 → 2026-03-30 · 3 obs

○ 2015-11-10 02:58:28
● 2016-02-27 22:16:54
● 2026-03-30 13:09:30

●NSns-uk.topdns.com2016-02-27 → 2026-03-30 · 3 obs

○ 2015-11-10 02:58:28
● 2016-02-27 22:16:54
● 2026-03-30 13:09:30

●NSns-usa.topdns.com2016-02-27 → 2026-03-30 · 3 obs

○ 2015-11-10 02:58:28
● 2016-02-27 22:16:54
● 2026-03-30 13:09:30

○NSns45.domaincontrol.com2015-05-06 → 2015-05-06 · 3 obs

● 2015-05-06 12:15:06
○ 2015-11-10 02:58:28
○ 2026-03-30 13:09:30

○NSns46.domaincontrol.com2015-05-06 → 2015-05-06 · 3 obs

● 2015-05-06 12:15:06
○ 2015-11-10 02:58:28
○ 2026-03-30 13:09:30

●MXmail.cityopensource.com2026-03-20 → 2026-03-30 · 3 obs

○ 2015-11-10 02:58:28
● 2026-03-20 19:32:22
● 2026-03-30 13:09:30

○MXmailstore1.secureserver.net2015-05-06 → 2015-05-06 · 3 obs

● 2015-05-06 12:15:06
○ 2015-11-10 02:58:28
○ 2026-03-30 13:09:30

○MXsmtp.secureserver.net2015-05-06 → 2015-05-06 · 3 obs

● 2015-05-06 12:15:06
○ 2015-11-10 02:58:28
○ 2026-03-30 13:09:30

○A195.154.133.1772016-02-27 → 2019-01-11 · 5 obs

○ 2015-11-10 02:58:28
● 2016-02-27 22:16:54
● 2019-01-11 22:19:04
○ 2026-03-20 19:32:22
○ 2026-03-30 13:09:30

●A46.252.157.1562026-03-20 → 2026-03-30 · 3 obs

○ 2019-01-11 22:19:04
● 2026-03-20 19:32:22
● 2026-03-30 13:09:30

○A50.63.202.392015-05-06 → 2015-05-06 · 3 obs

● 2015-05-06 12:15:06
○ 2015-11-10 02:58:28
○ 2026-03-30 13:09:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, e.gtld-servers.net...	-
cityopensource.com	ns-canada.topdns.com, ns-usa.topdns.com, ns-uk.topdns.com	4 records

✅ Authoritative Response

Server:77.247.183.137

NS records: ns-canada.topdns.com, ns-usa.topdns.com, ns-uk.topdns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cityopensource.com (unsigned zone)

⏱️ Timing

Total: 319ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`46.252.157.156`
NS	3	`ns-canada.topdns.com, ns-uk.topdns.com...`
MX	1	`mail.cityopensource.com (pri: 0)`
TXT	2	`google-site-verification=E7ua8Cf5DPShY2o, v=spf1 +ip4:46.252.157.156 +ip4:89.40.17`
SOA	1	`ns-uk.topdns.com hostmaster.topdns.com`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns-canada.topdns.com, ns-usa.topdns.com, ns-usa.topdns.com...)

Analysis

Hierarchy

cityopensource.com is a parent of www.cityopensource.com and mail.cityopensource.com.

IP Addresses

cityopensource.com points to a single IP address: 46.252.157.156.

Other host names such as www.effettidigitali.it, fone.it, letrec.net, mail.cityopensource.com and imap.ireplace.it share IPs with cityopensource.com.

Name Servers

cityopensource.com is delegated to three name servers: ns-canada.topdns.com, ns-uk.topdns.com and ns-usa.topdns.com.

cityopensource.com at least partially shares name servers with other domains, for example jameldebbouze.fr, cienergy.org, nemeziz.be, onerispose.com and fcswap.com.

Host names with two IP numbers:

ns-usa.topdns.com points to 143.198.68.197 and 161.35.225.48.

Host names with one IP number:

ns-canada.topdns.com points to 109.201.142.225.

ns-uk.topdns.com points to 77.247.183.137.

Mail Servers

The mail.cityopensource.com mail server handles cityopensource.com.

mail.cityopensource.com points to a single IP number: 46.252.157.156.

cityopensource.com - robtex.com