Autonomous system
AS46171 CFBISD-AS1
Unclassified ARIN
Summary
Carrollton-Farmers Branch Independent School District
education k12 texas us
CFBISD-AS1 is operated by Carrollton-Farmers Branch Independent School District.
What it's used for
- The space carries internal school district infrastructure, evidenced by the netname
CFBISDon the 192.206.243.0/24 prefix. - The AS announces 1280 IPv4 addresses across 2 prefixes with only 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or large access provider.
- Traffic consists of office workers, students, and staff accessing educational resources and administrative systems across the district's 39 schools in Carrollton, Texas.
Notable
- Registrants align with the announcer; the 192.206.243.0/24 prefix is registered to Carrollton-Farmers Branch Independent School Dist., while the larger 192.206.244.0/22 block shows a generic ARIN registry entry.
- The address inventory is compact, consisting of one /22 and one /24 block, typical for a single organizational entity managing its own IP space.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 1.28K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS46171- Registry name
- CFBISD-AS1
- Registrant
- Carrollton-Farmers Branch Independent School Dist.
- Abuse contact
- systems@cfbisd.edu
- Registered
- 2008-06-26
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 5 with no ROA
- ROAs
- 0 authorising AS46171
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 7 naming AS46171
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 1,772 prefixes, as published 2026-10-15. 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