AS819

AS819 is an actively-routed autonomous system registered to LARG*net (London and Region Global Computer Network), a not-for-profit regional network based in London, Ontario, Canada, operated in close association with Western University — it is not a dormant legacy ASN, and today originates roughly 18 IPv4 prefixes plus a single IPv6 block.

CAIDA AS Rank places AS819 at 3,696 globally as of 2026-08-05, with a customer cone of 6 ASNs, 52 prefixes, and 209,664 addresses, and an asnDegree total of 18 (5 customer, 8 peer, 5 provider) relationships. RIPEstat's routing-status corroborates the live announcement: 18 IPv4 prefixes covering about 12,032 addresses and 1 IPv6 prefix (2605:c700::/32), seen by all 327 of 327 IPv4 RIS peers and 321 of 321 IPv6 RIS peers, with 22 observed neighbours.

LARG*net is a member-owned regional area network (RAN), not a retail ISP. Its member base is public-sector and institutional: hospitals (London Health Sciences Centre — its primary internet connection for 30+ years — and St. Joseph's Health Care), the City of London and Middlesex County together with libraries and police/first-responder services, school boards, Western University and Fanshawe College, public utilities, and research organizations; it also brokers member access to eHealth Ontario and Ontario's ORION research network, and counts at least one private contract-research member (Alimentiv).

ARIN's RDAP autnum record for AS819 carries a top-level registration event of 2001-08-30, last changed 2012-02-24. PeeringDB lists LARG*net as a Non-Profit network carrying 10-20 Gbps of mostly-inbound traffic, running a Selective peering policy, with public peering at TorIX and facilities at Equinix Chicago and Telehouse Toronto.

CAIDA's degree profile shows 8 settlement-free peers. bgp.he.net's live BGP session table names at least six of them across IPv4 and IPv6: AS19752 (Hydro One Telecom), AS6939 (Hurricane Electric), AS174 (Cogent Communications), AS26677 (ORION), AS3257 (GTT Communications), and AS3303 (Swisscom). Older IRR-registered policy objects instead show imports from AS823 (Western University) and AS30323 with exports to AS19752 and AS15290; only AS19752 overlaps the live table, so the IRR objects may describe registered-but-not-currently-live relationships rather than the routed reality.

Governance is board-based: sponsoring members hold seats and assume financial risk, alongside regular-member and community-at-large representatives; named leadership per the operator's own site is Executive Director Dave Ghantous, Operations Director Tayfun Atasoy, and Board Chair R. Chelladurai (Western University).

RPKI

Confirmed absence of coverage for the two prefixes actually queried, not a whole-ASN finding — RIPEstat's rpki-validation endpoint was queried on 2026-08-05 against 198.20.32.0/19 (1 of AS819's 18 IPv4 prefixes; 8,192 of the ASN's 12,032 IPv4 addresses) and 2605:c700::/32 (AS819's sole IPv6 prefix), and both return status unknown with zero validating ROAs. The remaining eight IPv4 blocks — 198.96.18.0/24, 198.96.19.0/24, 198.96.80.0/22, 199.71.2.0/24, 192.139.219.0/24, 192.139.220.0/24, 205.211.140.0/22, and 205.211.144.0/23 (3,840 addresses) — were not queried, so this is not a confirmed absence of ROA coverage across AS819's full 19-prefix announced set. bgp.he.net likewise lists no valid RPKI originations for the prefixes it displays.

Abuse signal

Qrator Radar reports 0 BGP hijacks, 0 route leaks, 0 accepted leaks, and 0 DDoS amplifiers for AS819 as of 2026-08-05 (radar.qrator.net/as/819).

Blocklist status

No AS819 entry was found in the Spamhaus ASN-DROP list as of 2026-08-05 (spamhaus.org/drop/asndrop.txt); the legacy plain-text feed has been superseded by a JSON feed per its own header, which weakens this as a standalone negative signal.

Exposure metrics

Qrator Radar separately reports 51 vulnerable ports and roughly 1,430 routing loops tied to AS819's announced space — operational exposure figures, not confirmed abuse incidents.

Unresolved discrepancy

bgp.he.net still displays a generic "AS819 announces bogons" notice that conflicts with Qrator's bogons:0 figure as of 2026-08-05; this remains unverified and is not treated as a confirmed bogon-announcement incident.

Operator

LARG*net (London and Region Global Computer Network) — not-for-profit regional network; ARIN registrant LARG-NET, c/o Western University, London, ON, Canada [Confirmed] — ARIN RDAP autnum/819, largnet.ca/about

Country / RIR

CA, ARIN [Confirmed] — ARIN RDAP autnum/819

Allocated

2001-08-30 (ARIN RDAP autnum top-level registration event); last changed 2012-02-24 [Confirmed] — rdap.arin.net/registry/autnum/819

Org status

active not-for-profit corporation, board-governed (sponsoring members holding financial risk + regular-member reps + community-at-large seats); named leadership per site: Executive Director Dave Ghantous, Operations Director Tayfun Atasoy, Board Chair R. Chelladurai (Western University)

[Confirmed] — largnet.ca/about

Contacts

noc@largnet.ca (ARIN abuse contact, kind: "group" vCard) [Confirmed] — rdap.arin.net/registry/autnum/819

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-08-05 — Qrator Radar shows 0 BGP hijacks/0 route leaks/0 accepted leaks/0 DDoS amplifiers; no AS819 entry found in Spamhaus ASN-DROP; RPKI shows no ROA coverage for the two prefixes queried — 198.20.32.0/19 and 2605:c700::/32 — a confirmed negative for those two, not a whole-ASN finding (eight further IPv4 blocks remain unqueried); an unresolved bgp.he.net "announces bogons" notice conflicts with Qrator's bogons:0 and is flagged, not confirmed

Network & routing

Network type

regional, member-owned not-for-profit Regional Area Network (RAN) serving London, Ontario and the surrounding region ("Owen Sound to Windsor and everywhere in between"); PeeringDB classifies it Non-Profit, 10-20 Gbps traffic, mostly inbound [Confirmed] — largnet.ca/mission, peeringdb.com/asn/819

Size

18 originated IPv4 prefixes / ~12,032 addresses and 1 originated IPv6 block (2605:c700::/32); CAIDA AS Rank 3,696 globally; customer cone 6 ASNs, 52 prefixes, 209,664 addresses [Confirmed] — asrank.caida.org/asns/819, stat.ripe.net/AS819

Routing/peering

Selective peering policy per PeeringDB; public peering at TorIX (10G port); facilities at Equinix Chicago and Telehouse Toronto; IRR RADB::AS-LNET-MEMBERS; CAIDA asnDegree total 18 (customer 5, peer 8, provider 5); named live peers on bgp.he.net include AS19752 (Hydro One Telecom), AS6939 (Hurricane Electric), AS174 (Cogent), AS26677 (ORION), AS3257 (GTT), AS3303 (Swisscom) [Confirmed]. Older IRR policy objects (imports from AS823, AS30323; exports to AS19752, AS15290) only partially overlap the live table and may reflect registered-but-not-currently-routed relationships

[Likely] — asrank.caida.org/asns/819, bgp.he.net/AS819, peeringdb.com/asn/819

RPKI

no ROA coverage confirmed for the two prefixes actually queried, not a whole-ASN result — RIPEstat rpki-validation for 198.20.32.0/19 (1 of AS819's 18 IPv4 prefixes) and 2605:c700::/32 (its sole IPv6 prefix) returns status unknown with zero validating ROAs for each as of 2026-08-05; the other eight IPv4 blocks (3,840 of 12,032 IPv4 addresses) were not queried; bgp.he.net corroborates no valid RPKI originations for the prefixes it displays [Confirmed for the two queried prefixes; not assessed for the remaining eight IPv4 blocks] — stat.ripe.net/data/rpki-validation, bgp.he.net/AS819

Notable usage

hospitals (London Health Sciences Centre — primary internet connection 30+ years, St. Joseph's Health Care), the City of London and Middlesex County (incl. libraries, police, first-responder services), school boards, Western University, Fanshawe College, public utilities, research organizations, and private CRO member Alimentiv; also brokers access to eHealth Ontario and ORION

[Confirmed] — largnet.ca/press-impact, largnet.ca/about

Related ASNs

AS823 (Western University) is one of AS819's CAIDA-scored customers, not an upstream — AS823's own CAIDA asnDegree is customer 0 / peer 0 / provider 2 (two providers, zero customers), which rules out it being AS819's provider; an older IRR import from AS823 policy object does not establish the opposite direction. AS819's five CAIDA-scored providers are not enumerated by ASN in the ASRank API response (which returns only the aggregate asnDegree counts, not a named neighbour list) or in any other source checked this pass, so no upstream ASNs are named. AS30323, AS19752, AS15290 remain IRR-registered only, with no CAIDA-scored direction confirmed for any of them; live-observed peers per bgp.he.net are AS6939, AS174, AS26677, AS3257, AS3303 [Confirmed for CAIDA/bgp.he.net-observed peers and for AS823's customer-side direction; sourced null for AS819's named providers; Likely/unconfirmed for AS30323/AS19752/AS15290's direction] — bgp.he.net/AS819, asrank.caida.org/asns/819, asrank.caida.org/asns/823

Analyst note

an actively-routed regional not-for-profit ASN serving public-sector members in southwestern Ontario, unlike many small regional ASNs that sit dormant. CAIDA AS rank (3,696) and customer-cone size (6 ASNs, 52 prefixes, 209,664 addresses) are now confirmed via CAIDA AS Rank, previously missing because that source was absent from the original sources list. RPKI is a confirmed absence of ROA coverage for the two prefixes queried (198.20.32.0/19, 2605:c700::/32), not a whole-ASN result — eight further IPv4 blocks remain unqueried. AS823 was previously misclassified as an IRR-registered upstream; CAIDA shows AS823 with 0 customers, 0 peers, 2 providers, which makes it one of AS819's customers instead, and upstreams is now a sourced null because AS819's five CAIDA-scored providers are not individually named by any source checked. The bgp.he.net bogon-notice vs. Qrator bogons:0 discrepancy remains unresolved and is left flagged rather than resolved.