21cmuseum.com - robtex.com
21cmuseum.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 138.197.73.69🇺🇸 DIGITALOCEAN138.197.64.0/20 DigitalOcean | ||||||
| PTR | 1541134.cloudwaysapps.com | ||||||
| NS | ns1.yourhostingaccount.com ⭐ ⚠️ Not in parent delegation | ||||||
| A | 65.254.254.102🇺🇸 EIG-2987365.254.224.0/19 TML Customer | ||||||
| PTR | ns1.yourhostingaccount.com | ||||||
| NS | ns1.dotster.com ⚠️ Not in zone NS records | ||||||
| A | 172.64.52.250🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.dotster.com ⚠️ Not in zone NS records | ||||||
| A | 172.64.53.155🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.yourhostingaccount.com ⚠️ Not in parent delegation | ||||||
| A | 65.254.254.155🇺🇸 EIG-2987365.254.224.0/19 TML Customer | ||||||
| PTR | ns2.yourhostingaccount.com | ||||||
| MX | mail01.prototypeit.net ⭐ | ||||||
| SOA | ns1.yourhostingaccount.comadmin@yourhostingaccount.com 2012-08-16 #26 | ||||||
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=1771291435 | ||||||
Same first word
21cmuseum.com |
DNS History
7 records (6 active, 1 former)
●NSns1.dotster.com2026-03-20 → 2026-03-23 · 3 obs
● 2026-03-20 06:36:52
● 2026-03-23 10:10:58
●NSns1.yourhostingaccount.com2015-08-22 → 2026-03-23 · 2 obs
● 2026-03-23 10:10:58
●NSns2.dotster.com2026-03-20 → 2026-03-23 · 3 obs
● 2026-03-20 06:36:52
● 2026-03-23 10:10:58
●NSns2.yourhostingaccount.com2015-08-22 → 2026-03-23 · 2 obs
● 2026-03-23 10:10:58
●MXmail01.prototypeit.net2015-08-22 → 2026-03-23 · 2 obs
● 2026-03-23 10:10:58
○A108.166.85.922015-08-22 → 2017-03-25 · 4 obs
● 2017-03-25 14:00:18
○ 2020-01-13 07:12:06
○ 2026-03-23 10:10:58
●A138.197.73.692020-01-13 → 2026-03-23 · 3 obs
● 2020-01-13 07:12:06
● 2026-03-23 10:10:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| 21cmuseum.com | ns1.dotster.com, ns2.dotster.com | 2 records |
✅ Authoritative Response
Server:172.64.53.155
NS records: ns1.dotster.com, ns2.dotster.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21cmuseum.com (unsigned zone)
⏱️ Timing
Total: 261ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 138.197.73.69 |
| NS | 2 | ns2.yourhostingaccount.com, ns1.yourhostingaccount.com |
| MX | 1 | mail01.prototypeit.net (pri: 0) |
| SOA | 1 | ns1.yourhostingaccount.com admin.yourhos |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.dotster.com, ns2.dotster.com)
Analysis
IP Addresses
21cmuseum.com points to a single IP address: 138.197.73.69.
Other host names such as 21cdesmoines.com, mx.graydudley.com and graydudley.com share IP numbers with 21cmuseum.com.
Name Servers
21cmuseum.com is delegated to four name servers: ns1.dotster.com, ns2.dotster.com, ns1.yourhostingaccount.com and ns2.yourhostingaccount.com.
At least part of the name servers for 21cmuseum.com are shared with other domains, for instance landpersonnel.net, taichinyc.net, santos-dumont.net, thebauergroup.com and beeline.mobi.
these name servers are commonly used with the name servers ns1.mydomain.com, ns2.mydomain.com, ns3.mydomain.com, ns4.mydomain.com, ns1.netfirms.com, ns2.netfirms.com, ns2.nameresolve.com, ns4.nameresolve.com, ns1.verio.com and ns2.verio.com.
Host names with one IP: ns1.dotster.com points to 172.64.52.250; ns2.dotster.com points to 172.64.53.155; ns1.yourhostingaccount.com points to 65.254.254.102; ns2.yourhostingaccount.com points to 65.254.254.155.
Mail Servers
The mail server for 21cmuseum.com is mail01.prototypeit.net.
21cmuseum.com uses the same mail server setup as other domains, for instance credit-arbitrators.com, sheratonarlingtontx.com, milfordplaza.com, couturethis.com and sheratonarlingtontexas.com.