asn.dev

Autonomous system

AS21992 SSHA-ONE-ASN - Ontario Health

Unclassified ARIN

IPv4 addresses 19.97K 18 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly CA
Exchanges 0 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

Ontario Health

Canada · AI-generated

government health enterprise canada

The AS handle SSHA-ONE-ASN is held by Ontario Health.

What it's used for

  • The address space carries internal corporate infrastructure for the provincial health sector, evidenced by netnames SSHA-ONE-NETWORK and TRILLIUM-HEALTH-PARTNERS and registrants including Ontario Health, OH NOC, and OHCSO.
  • The AS announces 19,968 IPv4 addresses across 18 prefixes with only 2 observed neighbours, a ratio indicative of an internal corporate estate with site-by-site segmentation rather than a transit or access network.

Notable

  • Registrants largely align with the announcer, with Ontario Health and its NOC/CSO entities holding the majority of the space, while Trillium Health Partners holds the 205.210.180.0/22 block.
  • The inventory consists of 18 IPv4 prefixes with no IPv6 announcements, featuring a mix of /20, /21, /22, /23, and /24 blocks primarily within the 76.75.0.0/16 range.

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

ASNetworkPaths seen
AS19752Hydro One Telecom Inc.462

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, 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 18 prefixes · 19.97K addresses IPv6 0 prefixes

CountryNamePrefixes
CACanada18

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21992
Registry name
SSHA-ONE-ASN
Registrant
Ontario Health
Abuse contact
oh-ds_esd@ontariohealth.ca
Registered
2007-04-24
Last changed
2023-04-13
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 8 with no ROA
ROAs
0 authorising AS21992
ASPA
no ASPA record
IRR
25% registered · 2 of 8 announcements 4 other origin
Route objects
12 naming AS21992

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: 454 networks and 1,852 prefixes, as published 2026-11-08. 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