Domain · Tranco #33,142
nsidc.org
nsidc.org is ranked #33,142 among the world's most-visited sites (Tranco). It resolves to 128.138.135.43, hosted on k2.colorado.edu, and presents a TLS certificate issued by Let's Encrypt.
HTTP 302| Tranco rank | #33,142 |
|---|---|
| IPv4 | 128.138.135.43 |
| Hosting / reverse DNS | k2.colorado.edu |
| Hosting network | AS104 · COLORADO-AS - University of Colorado at Boulder, US |
| Nameservers | ns1.p201.dns.oraclecloud.net, ns2.p201.dns.oraclecloud.net, ns3.p201.dns.oraclecloud.net, ns4.p201.dns.oraclecloud.net |
| Mail servers (MX) | mx2-us1.ppe-hosted.com (15), mx1-us1.ppe-hosted.com (15) |
| HTTP status | 302 → https://nsidc.org/ |
| Web server | Apache/2.4.58 (Ubuntu) |
| Detected tech | Apache/2.4.58 (Ubuntu) |
| TLS certificate | Let's Encrypt · expires 2026-10-12 |
Notable DNS TXT records
v=spf1 ip4:128.138.135.55 include:colorado.edu include:mail.zendesk.com -all
More .org domains
FAQ
What is the IP address of nsidc.org?
nsidc.org resolves to 128.138.135.43 (k2.colorado.edu).
Who issued the SSL certificate for nsidc.org?
The TLS/SSL certificate for nsidc.org was issued by Let's Encrypt, valid until 2026-10-12.
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Start free on Mewayz →DNS/HTTP/TLS observed 2026-08-06; registration data via RDAP. Informational only. Download JSON · CSV · Browse domains