rtcuk.com - dns.ninja
rtcuk.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 162.159.140.128Cloudflare162.159.128.0/19 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| A | 172.66.0.126🇺🇸 Cloudflare172.66.0.0/22 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns0.dns.dotmailer.co.uk ⭐ | ||||||
| A | 162.159.10.164Cloudflare162.159.10.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.dns.dotmailer.co.uk | ||||||
| A | 198.41.222.126Cloudflare198.41.222.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cf-198-41-222-126.cloudflare.com | ||||||
| NS | ns2.dns.dotmailer.co.uk | ||||||
| A | 162.159.11.250Cloudflare162.159.11.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| MX | r1-smtp-in-1.dotmailer.co.uk ⭐ | ||||||
| A | 20.61.12.80🇳🇱 Microsoft20.48.0.0/12 | ||||||
| MX | r1-smtp-in-2.dotmailer.co.uk ⭐ | ||||||
| A | 20.61.12.96🇳🇱 Microsoft20.48.0.0/12 | ||||||
| TXT | v=spf1 include:spf.dotmailer.com -all | ||||||
| SOA | ns0.dns.dotmailer.co.ukdns-admin@dotdigital.com serial=2407758153 | ||||||
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.netnstld@verisign-grs.com serial=1785683192 | ||||||
Same first word
rtcuk.com |
Similar names
DNS History
16 records (7 active, 9 former)
●NSns0.dns.dotmailer.co.uk2015-08-14 → 2026-08-02 · 2 obs
● 2026-08-02 15:26:54
●NSns1.dns.dotmailer.co.uk2015-08-14 → 2026-08-02 · 2 obs
● 2026-08-02 15:26:54
●NSns2.dns.dotmailer.co.uk2015-08-14 → 2026-08-02 · 2 obs
● 2026-08-02 15:26:54
●MXr1-smtp-in-1.dotmailer.co.uk2020-02-24 → 2026-08-02 · 3 obs
● 2020-02-24 13:32:30
● 2026-08-02 15:26:54
●MXr1-smtp-in-2.dotmailer.co.uk2020-02-24 → 2026-08-02 · 3 obs
● 2020-02-24 13:32:30
● 2026-08-02 15:26:54
○MXsmtp-in-1.dotmailer.co.uk2015-08-14 → 2016-12-04 · 4 obs
● 2016-12-04 15:22:08
○ 2020-02-24 13:32:30
○ 2026-08-02 15:26:54
○MXsmtp-in-2.dotmailer.co.uk2015-08-14 → 2016-12-04 · 4 obs
● 2016-12-04 15:22:08
○ 2020-02-24 13:32:30
○ 2026-08-02 15:26:54
○A104.16.206.862020-02-24 → 2020-02-24 · 4 obs
● 2020-02-24 13:32:30
○ 2026-03-23 05:44:56
○ 2026-08-02 15:26:54
○A104.16.207.862020-02-24 → 2020-02-24 · 4 obs
● 2020-02-24 13:32:30
○ 2026-03-23 05:44:56
○ 2026-08-02 15:26:54
○A104.16.208.862020-02-24 → 2020-02-24 · 4 obs
● 2020-02-24 13:32:30
○ 2026-03-23 05:44:56
○ 2026-08-02 15:26:54
○A104.16.209.862020-02-24 → 2020-02-24 · 4 obs
● 2020-02-24 13:32:30
○ 2026-03-23 05:44:56
○ 2026-08-02 15:26:54
○A104.16.210.862020-02-24 → 2020-02-24 · 4 obs
● 2020-02-24 13:32:30
○ 2026-03-23 05:44:56
○ 2026-08-02 15:26:54
○A137.117.185.2202016-11-25 → 2016-12-04 · 5 obs
● 2016-11-25 11:46:54
● 2016-12-04 15:22:08
○ 2020-02-24 13:32:30
○ 2026-08-02 15:26:54
●A162.159.140.1282026-03-23 → 2026-08-02 · 3 obs
● 2026-03-23 05:44:56
● 2026-08-02 15:26:54
●A172.66.0.1262026-03-23 → 2026-08-02 · 3 obs
● 2026-03-23 05:44:56
● 2026-08-02 15:26:54
○A94.143.104.1542015-08-14 → 2016-08-17 · 4 obs
● 2016-08-17 04:38:30
○ 2016-11-25 11:46:54
○ 2026-08-02 15:26:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| rtcuk.com | ns0.dns.dotmailer.co.uk, ns1.dns.dotmailer.co.uk, ns2.dns.dotmailer.co.uk | - |
✅ Authoritative Response
Server:162.159.10.164
NS records: ns0.dns.dotmailer.co.uk, ns1.dns.dotmailer.co.uk, ns2.dns.dotmailer.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rtcuk.com (unsigned zone)
⏱️ Timing
Total: 386ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 162.159.140.128, 172.66.0.126 |
| NS | 3 | ns0.dns.dotmailer.co.uk, ns1.dns.dotmailer.co.uk... |
| MX | 2 | r1-smtp-in-1.dotmailer.co.uk (pri: 10), r1-smtp-in-2.dotmailer.co.uk (pri: 10) |
| TXT | 1 | v=spf1 include:spf.dotmailer.com -all |
| SOA | 1 | ns0.dns.dotmailer.co.uk dns-admin.dotdig |
Analysis
IP Addresses
rtcuk.com has two IP addresses: 162.159.140.128 and 172.66.0.126
Additional host names — airportworldmag.com, news.mamasandpapas.com, nissanathensmail.com and two others — share IP numbers with rtcuk.com.
Name Servers
rtcuk.com is delegated to three name servers: ns0.dns.dotmailer.co.uk, ns1.dns.dotmailer.co.uk and ns2.dns.dotmailer.co.uk.
The name servers of rtcuk.com overlap at least partially with those of other domains — among them email.pavers.co.uk, dosport-mail.com, dhlfreight-news.com and two more.
The name servers ns0.dns.dotdigital.com, ns1.dns.dotdigital.com and ns2.dns.dotdigital.com are commonly seen alongside these name servers.
ns0.dns.dotmailer.co.uk, ns1.dns.dotmailer.co.uk and ns2.dns.dotmailer.co.uk each resolve to a single IP address: ns0.dns.dotmailer.co.uk resolves to 162.159.10.164, ns1.dns.dotmailer.co.uk resolves to 198.41.222.126 and ns2.dns.dotmailer.co.uk resolves to 162.159.11.250.
Mail Servers
rtcuk.com has two mail servers: r1-smtp-in-1.dotmailer.co.uk and r1-smtp-in-2.dotmailer.co.uk.
rtcuk.com shares the same mail server setup as other domains, including email.parkcloud.com, email.dotdigital.com, e.wex.co.uk and two others.
rtcuk.com shares mail servers — at least in part — with other domains, including mail2.mps.org.uk, bathrugby-comms.co.uk, dufry-communication.com and two others.
The mail servers r1-smtp-in-1.dotdigital.com and r1-smtp-in-2.dotdigital.com are commonly paired with these mail servers.
Both r1-smtp-in-1.dotmailer.co.uk and r1-smtp-in-2.dotmailer.co.uk have a single IP address each — r1-smtp-in-1.dotmailer.co.uk resolves to 20.61.12.80 while r1-smtp-in-2.dotmailer.co.uk resolves to 20.61.12.96.