AS21965 HIGHMARK - Highmark Inc
🇺🇸ARINassigned
Announced Prefixes (BGP)
22total
22 IPv40 IPv6
IPv4 Addresses
Allocated (RIR)133,888
Announced (BGP)5,632
IPv6 Addresses
Allocated (RIR)0
Announced (BGP)0
Announced Prefixes
(BGP)22|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| No ROA | Other IRR | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 | |
| No ROA | ARIN | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 |
1-10 of 22
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Allocated Prefixes
(RIR)12Prefix | Country | RIR | Status |
|---|---|---|---|
| 157.154.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 167.164.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 192.152.123.0/24 | 🇺🇸 US | ARIN | allocated |
| 198.153.220.0/24 | 🇺🇸 US | ARIN | allocated |
| 198.153.221.0/24 | 🇺🇸 US | ARIN | allocated |
| 198.200.200.0/24 | 🇺🇸 US | ARIN | allocated |
| 199.190.160.0/23 | 🇺🇸 US | ARIN | allocated |
| 199.190.163.0/24 | 🇺🇸 US | ARIN | allocated |
| 199.190.164.0/24 | 🇺🇸 US | ARIN | allocated |
| 199.190.166.0/24 | 🇺🇸 US | ARIN | allocated |
1-10 of 12
1 / 2
All 22 announced prefixes of AS21965 →
BGP Neighbours
(seen in AS paths)Upstreams (4)
Networks AS21965 hands its own prefixes to: transit providers, or peers at an exchange.
Downstreams (1)
Networks whose own prefixes AS21965 passes on: usually its customers.
- AS22255Allegheny Health Network18
ASPA
No ASPA
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- ASPA explainedWhy AS21965 should publish an ASPA object
- IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/21965Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/21965" | jq