asn.dev

Autonomous system

AS62671 UNIVERSITY-OF-COLORADO-SYSTEM - ECS-Infrastructure

Unclassified ARIN

IPv4 addresses 1.02K 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

University of Colorado System

United States of America · AI-generated

education university research infrastructure

UNIVERSITY-OF-COLORADO-SYSTEM is operated by ECS-Infrastructure, the IT division of the University of Colorado system.

What it's used for

  • The address space carries internal university infrastructure, evidenced by reverse DNS entries such as sharepointdev.cu.edu, radius1-nat.cu.edu, and jobsatcu.com.
  • The AS announces 1024 IPv4 addresses across 2 prefixes with 1 observed neighbour, indicating a small, self-contained internal network rather than a transit or large-scale access provider.
  • Traffic from this AS consists of internal university services, research endpoints, and administrative systems for the four-campus University of Colorado system.

Notable

  • Registrants for both announced prefixes (204.228.68.0/23 and 204.228.70.0/23) are listed as ECS-Infrastructure with netname UCUISNET-U4, aligning with the AS holder.
  • The address inventory is compact, consisting of two contiguous /23 blocks, typical of a single institutional network estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS14041University Corporation for Atmospheric Research186

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 2 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS62671
Registry name
UNIVERSITY-OF-COLORADO-SYSTEM
Registrant
ECS-Infrastructure
Abuse contact
ecs-infrastructure@cu.edu
Registered
2013-08-01
Last changed
2018-10-03
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 3 valid, 0 with no ROA
ROAs
1 authorising AS62671
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
4 naming AS62671

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 453 networks and 1,846 prefixes, as published 2026-11-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check