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InternetData
IPv4 address

4.37.221.120

An address in Denver, Colorado, United States, used by Colorado Mountain College, announced by Level 3 Parent, LLC (AS3356). It's a VPN exit and a web server on port 443.

Summary

No mobile carrier, anycast or CDN

  • WebPort 443

Geolocation

Where the address is, and what that place uses.

City
Denver
Region
Colorado
Postal code
80203
Continent
North America
Timezone
America/Denver

Ownership

Who holds the address: the AS announcing it, the registry record, the abuse contact and its name in DNS.

AS number
AS3356
Prefix
4.0.0.0/9
RPKI
Not found
Type
ISP
Domain
lumen.com
Registered in
United States
Network name
LVLT-ORG-4-8
Organization
LPL-141
Status
allocation
Registry
ARIN
Name
L3 Abuse Contact
Phone
+1-877-453-8353
Address
100 CenturyLink Drive, Monroe, LA, 71203
Network
4.0.0.0-4.127.255.255
Not seen inIP RWHOISIP RDNS

Anonymity

Whether the address hides someone else: a VPN, Tor, a relay, a proxy pool, or a hosting range.

Confidence
Low
Last seen
2026-11-11

Network

What kind of network it is on: a mobile carrier, a satellite operator, an anycast service, a CDN edge.

Services

What our own internet-wide measurement found listening on it.

443 status
200
443 TLS
TLSv1.3
443 certificate
*.coloradomtn.edu · Colorado Mountain College
443 issuer
C=US, O=DigiCert Inc, CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
443 browser-trusted
Yes
443 seen
2026-08-09 to 2026-10-31

Domain

The registered domains that resolve to the address, the most popular first.

00 · Evaluate

Test the real build first.

An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.

01 · License

Then license what you use.

Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell, priced by scope rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.