asn.dev

Autonomous system

AS12011 TSD-AS-01

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

Thompson School District

United States · AI-generated

education k12

A Colorado school district holding its own AS number and one /24.

What it's used for

  • School district connectivity. 256 addresses in a single /24 with one observed BGP neighbour and no IPv6 announced.

Notable

  • The AS handle is TSD-AS-01, numbered as if a second were expected.
  • The block, 69.2.159.0/24, is netname TSDR-1, registered directly to the district.
  • The netname adds an R the handle does not have.
  • Present in routing data since the collectors' earliest records in August 2000.

Interesting

  • Colorado school districts carry a letter-and-number designation alongside their name, and this one is Thompson R2-J. The stray R in TSDR-1 is most likely the start of that designation, clipped where the netname ran out of room.
  • A district running its own autonomous system rather than sitting behind a state education network is a choice about independence. It costs an AS number, a router somebody has to understand, and a relationship with a carrier, and it buys the ability to change providers without renumbering every school.
  • One neighbour means that independence is currently theoretical. The machinery for a second upstream is in place; the second upstream is not.

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
AS394838Pulse65

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-24, 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
AS12011
Registry name
TSD-AS-01
Registrant
Thompson School District
Abuse contact
networkops@thompsonschools.org
Registered
2018-12-06
Last changed
2018-12-06
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS12011
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS12011

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: 442 networks and 1,779 prefixes, as published 2026-10-24. 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