asn.dev

Autonomous system

AS26779 CFISD

Unclassified ARIN

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Cypress-Fairbanks ISD

United States of America · AI-generated

education k12 texas enterprise

The AS handle CFISD is operated by Cypress-Fairbanks Independent School District.

What it's used for

  • The space carries the district's internal network infrastructure, identified by the netname CFISD-V4 and registrant Cypress-Fairbanks ISD.
  • The inventory consists of a single IPv4 prefix (104.255.204.0/22) comprising 1024 addresses, with 0 IPv6 prefixes announced.
  • With only 2 observed neighbours, the low neighbour count relative to the address block indicates a direct enterprise connection rather than a transit or access provider role.

Notable

  • The RDAP registrant Cypress-Fairbanks ISD matches the AS holder, confirming consistent ownership of the address space.
  • The address inventory is a single contiguous /22 block, typical for a large institutional network requiring a stable, manageable range.

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
AS174Cogent Communications, LLC208
AS35847Ezee Fiber83

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS26779
Registry name
CFISD
Registrant
Cypress-Fairbanks ISD
Abuse contact
Oscar.Villar@cfisd.net
Registered
2014-10-16
Last changed
2014-10-16
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 5 with no ROA
ROAs
0 authorising AS26779
ASPA
no ASPA record
IRR
100% registered · 5 of 5 announcements
Route objects
8 naming AS26779

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 1,781 prefixes, as published 2026-10-16. 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