AS21984 — FCPS

AS21984 announces 1 IPv4 prefixes covering 65,536 addresses and 0 IPv6 prefixes.

About this network

FCPS is the autonomous system for Fairfax County Public Schools.

What it's used for

• The address space carries the network infrastructure for the Fairfax County Public Schools district, as indicated by the consistent FCPS netname and registrant across all prefixes.
• The AS announces 65,536 IPv4 addresses across 8 prefixes with only 2 observed neighbours, a ratio that implies an access or internal network role rather than transit.

Notable

• All registrants agree with the announcer, with every prefix registered to Fairfax County Public Schools under the netname FCPS.
• The address inventory is finely subdivided into eight prefixes ranging from /17 to /23, suggesting site-by-site segmentation within the school district's internal estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 151.188.0.0/16

Upstream networks

• AS22773 Cox Communications Inc.
• AS6461 Zayo Bandwidth

Adjacent networks

• AS22773 Cox Communications Inc.
• AS6461 Zayo Bandwidth

Routing security

• RPKI: 0 valid, 0 invalid and 6 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 67% of announcements registered; 4 route objects.
• Listed in as-sets: AS-COX-NOVA, AS-UDOS.