ciena.us.com - robtex.com
ciena.us.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 43.245.41.13🇦🇺 SQUIZ-AS-AP43.245.41.0/24 Squiz hosting | ||||||
| PTR | 13.41.245.43.in-addr.arpa | ||||||
| NS | ns4.ciena.com ⭐ | ||||||
| A | 40.89.253.123🇺🇸 Microsoft40.80.0.0/12 | ||||||
| NS | cfns1.cienans.com | ||||||
| A | 2400:cb00:2049:1::a29f:970🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| PTR | cfns1.cienans.com | ||||||
| A | 162.159.9.112Cloudflare162.159.9.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cfns1.cienans.com | ||||||
| NS | cfns2.cienans.com | ||||||
| A | 2400:cb00:2049:1::a29f:898🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| PTR | cfns2.cienans.com | ||||||
| A | 162.159.8.152Cloudflare162.159.8.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cfns2.cienans.com | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns4.ciena.comdomainregtech@ciena.com serial=379908381 | ||||||
us.com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 54.153.56.183🇺🇸 Amazon54.153.0.0/17 EC2 SFO prefix | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | ns1.centralnic.net | ||||||
| NS | ns2.centralnic.net | ||||||
| NS | ns3.centralnic.net | ||||||
| NS | ns4.centralnic.net | ||||||
| MX | mx-01.emailme.com ⭐ | ||||||
| TXT | v=spf1 mx -all | ||||||
| TXT | google-site-verification=TQ9DQVGZ4sDKfEbBIAiflq7ZKjGuCOC_vEpwyw_XsW8 | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=3000783111 | ||||||
rank #215 in the tld
us.com
us.comis a private domain registry operated by CentralNic (now Team Internet Group plc) that offers third-level registrations as an alternative to the official.usor.comextensions. Unlike the official.uscountry-code top-level domain, registrations underus.comare unrestricted and available to anyone globally.
Key facts
- Owner / operator: CentralNic (Team Internet Group plc)
- TLD:
.com— gTLD - Primary purpose: Domain registry for third-level subdomains
- Status: active
History
| Year | Event |
|---|---|
| 1995 | Theus.comregistry is established to offer third-level domain registrations. |
| 1996 | CentralNic, the operator of the registry, is founded. |
| 2023 | CentralNic Group plc officially rebrands to Team Internet Group plc. |
📈 Tranco rank: #1,088
Same first word
Similar names
DNS History
12 records (4 active, 8 former)
○NSauth100.ns.uu.net2015-11-07 → 2017-03-14 · 5 obs
● 2015-11-07 12:40:36
● 2017-03-14 17:18:02
○ 2026-07-08 12:08:50
○ 2026-07-15 07:18:16
●NScfns1.cienans.com2026-07-08 → 2026-07-15 · 3 obs
● 2026-07-08 12:08:50
● 2026-07-15 07:18:16
●NScfns2.cienans.com2026-07-08 → 2026-07-15 · 3 obs
● 2026-07-08 12:08:50
● 2026-07-15 07:18:16
○NSdns1.ciena.com2008-12-18 → 2015-05-07 · 4 obs
● 2015-05-07 02:41:24
○ 2015-11-07 12:40:36
○ 2026-07-15 07:18:16
○NSdns2.ciena.com2008-12-18 → 2015-05-07 · 4 obs
● 2015-05-07 02:41:24
○ 2015-11-07 12:40:36
○ 2026-07-15 07:18:16
○NSdns3.ciena.com2015-05-07 → 2015-05-07 · 4 obs
● 2015-05-07 02:41:24
○ 2015-11-07 12:40:36
○ 2026-07-15 07:18:16
○NSns1.ciena.com2015-11-07 → 2017-03-14 · 5 obs
● 2015-11-07 12:40:36
● 2017-03-14 17:18:02
○ 2026-07-08 12:08:50
○ 2026-07-15 07:18:16
○NSns2.ciena.com2015-11-07 → 2017-03-14 · 5 obs
● 2015-11-07 12:40:36
● 2017-03-14 17:18:02
○ 2026-07-08 12:08:50
○ 2026-07-15 07:18:16
●NSns4.ciena.com2026-07-08 → 2026-07-15 · 3 obs
● 2026-07-08 12:08:50
● 2026-07-15 07:18:16
○A208.80.56.112015-05-07 → 2017-03-14 · 5 obs
● 2015-05-07 02:41:24
● 2017-03-14 17:18:02
○ 2026-07-08 12:08:50
○ 2026-07-15 07:18:16
●A43.245.41.132026-07-08 → 2026-07-15 · 3 obs
● 2026-07-08 12:08:50
● 2026-07-15 07:18:16
○A63.118.34.772008-12-18 → 2008-12-18 · 3 obs
○ 2015-05-07 02:41:24
○ 2026-07-15 07:18:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | b.gtld-servers.net, h.gtld-servers.net, f.gtld-servers.net, d.gtld-servers.net... | - |
| us.com | ns1.centralnic.net, ns2.centralnic.net, ns3.centralnic.net, ns4.centralnic.net | - |
| ciena.us.com | cfns1.cienans.com, cfns2.cienans.com | - |
✅ Authoritative Response
Server:162.159.9.112
NS records: cfns1.cienans.com, cfns2.cienans.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ciena.us.com (unsigned zone)
⏱️ Timing
Total: 752ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 43.245.41.13 |
| NS | 2 | cfns1.cienans.com, cfns2.cienans.com |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | ns4.ciena.com domainregtech.ciena.com |
Analysis
IP Addresses
ciena.us.com points to a single IP number: 43.245.41.13.
Additional host names — cienacorp.jp, ciena.be, ciena.ie and two others — share IP numbers with ciena.us.com.
Name Servers
ciena.us.com is delegated to three name servers: ns4.ciena.com, cfns1.cienans.com and cfns2.cienans.com.
ciena.us.com partially shares its NS delegation with several other domains, including centinasystems.co.in, ciena.vn, openwag.org and two others.
These name servers regularly co-occur with the name servers ns2.ciena.com, ns0111.secondary.cloudflare.com and ns0201.secondary.cloudflare.com.
Host names with two IP numbers:
cfns1.cienans.com points to 162.159.9.112 and 2400:cb00:2049:1::a29f:970.
cfns2.cienans.com points to 162.159.8.152 and 2400:cb00:2049:1::a29f:898.
Host names pointing to a single IP address:
ns4.ciena.com points to 40.89.253.123.