asn.dev

Autonomous system

AS18558 NETBLK-RCOEK

Unclassified ARIN

IPv4 addresses 72.20K 125 prefixes
IPv6 prefixes 5 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 2 downstream
Flagged prefixes 63 see address space

Summary

Riverside County Office of Education

United States of America · AI-generated

education government k12 california

NETBLK-RCOEK is operated by Riverside County Office of Education.

What it's used for

  • The address space carries educational infrastructure, evidenced by netnames like RCOEK-12NET and ALVORDNET, and reverse DNS entries such as nat-block.banning.k12.ca.us and nat.murrieta.k12.ca.us.
  • The AS announces 72202 IPv4 addresses across 123 prefixes and 4 IPv6 prefixes, while maintaining only 3 observed neighbours, a ratio indicative of an access network serving local districts rather than a transit provider.

Notable

  • Registrants include County of Riverside and Alvord Unified School District, aligning with the announcer's identity as a county-level educational body supporting multiple districts.
  • The inventory is finely subdivided into numerous /20, /21, and /22 blocks, reflecting site-by-site segmentation for individual schools or district offices within the county.

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, 2 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS2152CENIC8,875

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, 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 125 prefixes · 72.20K addresses IPv6 5 prefixes

CountryNamePrefixes
USUnited States of America130

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS18558
Registry name
NETBLK-RCOEK
Registrant
Riverside County Office of Education
Abuse contact
dwilkinson@rcoe.us
Registered
2000-09-12
Last changed
2025-10-20
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 142 with no ROA
ROAs
0 authorising AS18558
ASPA
no ASPA record
IRR
100% registered · 142 of 142 announcements
Route objects
103 naming AS18558

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: 448 networks and 1,849 prefixes, as published 2026-10-29. 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