Autonomous system
AS10867 FHDA-AS
Education ARIN
Summary
Foothill-DeAnza Community College District
education legacy
FHDA-AS is the Foothill-DeAnza Community College District, the two-campus public community college district in California's Santa Clara County that operates Foothill College in Los Altos Hills and De Anza College in Cupertino.
What it's used for
Campus networking for the district. RIS shows 3 announced IPv4 prefixes carrying 65,536 addresses and 1 observed BGP neighbour, with no IPv6 in the routing table. The prefixes are 153.18.0.0/16 plus its two covering halves, 153.18.0.0/17 and 153.18.128.0/17, which is the classic shape of a single legacy Class B being announced both as a whole and split for traffic engineering or multi-site separation between the two campuses.
The single observed neighbour is the tell for role. This is an edge network with one upstream, almost certainly reached through California's regional research and education networking, not a network that sells transit or peers widely. Everything about the footprint says an institution announcing its own campus space: faculty and staff workstations, lab and classroom networks, student wireless, and the district's own servers.
Notable
Sixty-five thousand addresses for a two-college district is enormous by modern standards, and it is a straightforward artifact of when the block was assigned. A /16 was an ordinary allocation for a university or district in the pre-CIDR era; nobody would issue one today.
Interesting
The district sits in the geographic heart of Silicon Valley, with De Anza College roughly across the road from Apple's Cupertino campus.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS2152 | CENIC | 1,152 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 22 prefixes · 65.80K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 22 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10867- Registry name
- FHDA-AS
- Registrant
- Foothill-DeAnza Community College District
- Abuse contact
- metcalfkevin@fhda.edu
- Registered
- 1997-12-12
- Last changed
- 2023-09-27
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 18 with no ROA
- ROAs
- 0 authorising AS10867
- ASPA
- no ASPA record
- IRR
- 100% registered · 18 of 18 announcements
- Route objects
- 1 naming AS10867
Reputation
Classification and threat
Education University, school or national research and education network.
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: 447 networks and 1,843 prefixes, as published 2026-11-01. 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