asn.dev

Autonomous system

AS63435 MONTEREY-AS-01 - County of Monterey

Unclassified ARIN

IPv4 addresses 1.28K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 5 0 downstream
Flagged prefixes 1 see address space

Summary

County of Monterey

United States of America · AI-generated

government municipal network

MONTEREY-AS-01 is operated by the County of Monterey.

What it's used for

  • The address space carries municipal government infrastructure, evidenced by netnames such as MONTEREY-NET-01 and MCIT-MONT-FREE-LIBRARY-1.
  • The AS announces 1,282 IPv4 addresses across 5 prefixes with 5 observed neighbours, indicating a small-scale internal network rather than a transit or large access provider.
  • Traffic from this AS consists of internal county operations, including library services and general administrative connectivity for the government entity.

Notable

  • Registrants for the majority of prefixes are the County of Monterey, while 50.145.72.0/24 is registered to Comcast Cable Communications, LLC and 137.164.7.82/31 to CENIC.
  • The inventory is a mix of government-owned space and leased or partner blocks, with the Comcast prefix suggesting a specific service or backhaul arrangement.
  • The address inventory is small and fragmented, consistent with a single municipal organization managing its own connectivity.

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

5 upstream, 0 downstream and 5 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS33651Comcast Cable Communications, LLC99
AS2152CENIC68
AS11404Wave Broadband59
AS7018AT&T Enterprises, LLC58
AS33667Comcast Cable Communications, LLC20

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-03, 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 5 prefixes · 1.28K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America5

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS63435
Registry name
MONTEREY-AS-01
Registrant
County of Monterey
Abuse contact
berryw@co.monterey.ca.us
Registered
2015-03-10
Last changed
2022-08-25
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
80% valid · 4 valid, 1 with no ROA
ROAs
4 authorising AS63435
ASPA
no ASPA record
IRR
80% registered · 4 of 5 announcements
Route objects
10 naming AS63435

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: 451 networks and 1,853 prefixes, as published 2026-11-04. 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