asn.dev

Autonomous system

AS31904 NCWCD-80513

Unclassified ARIN

IPv4 addresses 256 1 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

Northern Water

United States of America · AI-generated

government water utility internal

The AS handle NCWCD-80513 is held by Northern Water.

What it's used for

  • The space carries internal corporate infrastructure for a public water agency, evidenced by the netname NCWCD and registrant Northern Water.
  • The inventory consists of 256 IPv4 addresses within a single /24 prefix, with 1 observed neighbour, indicating a small, isolated internal network rather than a transit or access provider.

Notable

  • The registrant Northern Water agrees with the announcer, confirming the space is owned and operated by the same entity.
  • Northern Water is a public agency created in 1937 to manage the Colorado-Big Thompson Project, transferring water from the West Slope to the East Slope of Colorado.
  • The address inventory is a single contiguous /24 block, typical for a small organizational footprint.

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
AS33652Comcast Cable Communications, LLC60

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, 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 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS31904
Registry name
NCWCD-80513
Registrant
Northern Water
Abuse contact
dwood@northernwater.org
Registered
2008-01-16
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS31904
ASPA
no ASPA record
IRR
0% registered · 0 of 1 announcements
Route objects
1 naming AS31904

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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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