asn.dev

Autonomous system

AS36548 ASCOJ - City of Jacksonville, Florida

Unclassified ARIN

IPv4 addresses 67.33K 55 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 3 see address space

Summary

City of Jacksonville

United States of America · AI-generated

government municipal network

ASCOJ is operated by the City of Jacksonville, Florida.

What it's used for

  • The address space carries municipal infrastructure, identified by the consistent netname COJAX across all sampled prefixes.
  • The AS announces 67584 IPv4 addresses across 55 prefixes while maintaining only 2 observed neighbours, a ratio indicative of a self-contained internal corporate or government estate rather than a transit or access provider.

Notable

  • All registrants in the evidence pack align with the announcer, consistently listing the City of Jacksonville, Florida.
  • The inventory is dominated by the 161.243.0.0/16 range, subdivided into numerous /19, /20, /21, /22, and /23 blocks, reflecting a finely segmented internal network design.

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

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS11096FloridaNet1,800
AS7018AT&T Enterprises, LLC1

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-10, 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 55 prefixes · 67.33K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America55

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS36548
Registry name
ASCOJ
Registrant
City of Jacksonville, Florida
Abuse contact
TOssi@coj.net
Registered
2006-01-30
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 30 with no ROA
ROAs
0 authorising AS36548
ASPA
no ASPA record
IRR
97% registered · 29 of 30 announcements
Route objects
14 naming AS36548

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: 454 networks and 1,847 prefixes, as published 2026-11-11. 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