Autonomous system
AS10851 SJCB - St Johns County BOCC
Unclassified ARIN
Summary
St. Johns County Board of County Commissioners
government legacy
SJCB is the St. Johns County Board of County Commissioners — the elected governing body of St. Johns County, Florida (county seat St. Augustine). It is a local-government network, not a service provider.
What it's used for
County government IT. RIS sees a single announced IPv4 prefix, 162.251.206.0/24 — 256 addresses — plus three IPv6 /44s from 2620:137:50xx::, against 2 observed BGP neighbours.
The proportions tell the story. A county that runs public-safety dispatch, courts, libraries, utilities and a few hundred staff systems does not need a large public IPv4 footprint: almost everything lives behind NAT on private space, and the routed /24 exists to host the handful of services that must be reachable from the internet and to give the county a provider-independent presence it keeps when it changes carriers. Two upstreams is redundancy, not peering.
Notable
The IPv6 side is disproportionately generous — three /44s against a single IPv4 /24. That is normal and even sensible: IPv6 assignments from ARIN's 2620: provider-independent block are sized for future internal addressing rather than scarcity, so a public body can take enough space to number every department and site natively while its IPv4 presence stays tiny.
No reverse DNS came back for the two addresses sampled. That is a sample, not a finding, and no inference is drawn from it.
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 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10851- Registry name
- SJCB
- Registrant
- St Johns County BOCC
- Abuse contact
- pnorris@sjcfl.us
- Registered
- 2018-01-03
- Last changed
- 2018-01-03
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS10851
- ASPA
- no ASPA record
- IRR
- 75% registered · 3 of 4 announcements
- Route objects
- 2 naming AS10851
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: 447 networks and 1,843 prefixes, as published 2026-11-02. 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