AS520

AS520 is a legacy autonomous system number registered under ARIN to CCOIS, "Coins Community Online Intelligence System," a U.S. Department of Defense network tied to COINS — the Community On-Line Intelligence System. Declassified CIA reading-room material places COINS' origin around 1965, following a President's Foreign Intelligence Advisory Board recommendation to interconnect Washington-area intelligence-community databases; the project was NSA-managed, with a Project Management Office and Network Control Center at Fort George G. Meade, Maryland, and it interconnected historically with DIA's IDHSC network. ARIN's registrant address for CCOIS matches that same Fort Meade location, and the listed administrative/technical/abuse contact, Ronald L. Smith of the COINS Network Control Center, has an ARIN-flagged unvalidated point-of-contact record dating to 2010. Despite an "active" RDAP status, AS520 shows no live routing footprint: every routing source consulted (RIPEstat, CAIDA AS Rank, bgp.he.net, bgp.tools) agrees it originates zero IPv4 and zero IPv6 prefixes, has zero visible BGP peers, and zero observed neighbours, with a CAIDA AS rank of 79,459 — near the bottom of the global ranking — and a customer cone consisting only of itself. No RPKI posture is assessable given the absence of announced prefixes, and no notable public abuse or threat-intelligence signal for AS520 was found as of July 2026 across Spamhaus, AbuseIPDB search results, and Talos, consistent with a dormant government-network allocation rather than active infrastructure.

Operator

CCOIS — "Coins Community Online Intelligence System," a U.S. Department of Defense/intelligence-community network (COINS Network Control Center, Fort George G. Meade, MD) [Confirmed] — https://rdap.arin.net/registry/autnum/520

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/520 (RIPEstat abuse-contact-finder authoritative_rir: arin)

Allocated

1989-09-19 (ARIN RDAP autnum TOP-LEVEL registration event); last changed 1991-01-10 [Confirmed, corroborated independently by bgp.tools "Registered September 19, 1989"] — https://rdap.arin.net/registry/autnum/520

Org status

ARIN RDAP status "active," but the ASN is not currently announcing any prefixes and has 0 observed BGP peers — dormant/unrouted as of this research [Confirmed] — https://rdap.arin.net/registry/autnum/520, https://bgp.he.net/AS520

Contacts

abuse/administrative/technical POC Ronald L. Smith (RLS6-ARIN) at the COINS Network Control Center, Fort George G. Meade, MD, reachable via the COINS project mailbox COINS@charm.isi.edu; the direct-dial number on that POC record is not reproduced here. ARIN flags the POC as unvalidated since 2010-06-20

[Confirmed] — https://rdap.arin.net/registry/autnum/520

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-10 — not in Spamhaus DROP/ASN-DROP, AbuseIPDB search results, Talos Intelligence, or NANOG archives; sparse commercial-feed coverage of a low-traffic government ASN limits confidence

Network & routing

Network type

legacy U.S. government/intelligence-community interconnection network (COINS), non-commercial, non-transit; currently unrouted [Likely] — https://rdap.arin.net/registry/autnum/520, https://bgp.he.net/AS520

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA AS Rank / bgp.he.net / bgp.tools (2026-07)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/327 v4, 0/321 v6); 0 observed neighbours; CAIDA asnDegree total/customer/peer all 0; no upstreams or peers visible in any source [Confirmed] — RIPEstat routing-status, CAIDA ASRank, https://bgp.he.net/AS520

RPKI

not assessable — AS520 announces no prefixes, so RIPEstat's rpki-validation endpoint was skipped (requires a prefix) [Unknown / not applicable] — RIPEstat rpki-validation endpoint response for AS520

Notable usage

COINS (Community On-Line Intelligence System) began around 1965 per a PFIAB recommendation to interconnect Washington-area intelligence-community databases; NSA-managed, Project Management Office at Fort George G. Meade, MD; historically interconnected with DIA's IDHSC network

[Likely] — https://www.cia.gov/readingroom/document/cia-rdp80b01139a000100020007-4

Analyst note

Encountered as a dormant legacy DoD/intelligence-community ASN with an "active" RIR status but zero routing visibility across all sources checked; no public official website or peering policy exists for this network, which is expected for a non-commercial legacy defense allocation.