AS5766 — IHS-MD-AS

AS5766 announces 13 IPv4 prefixes covering 66,048 addresses and 1 IPv6 prefixes.

About this network

IHS-MD-AS is the Indian Health Service, the US federal agency within the Department of Health and Human Services that provides healthcare to American Indian and Alaska Native people. The MD in the handle refers to the agency's Maryland headquarters.

What it's used for

• The agency's own wide-area network, connecting IHS hospitals, health centres and clinics to headquarters systems and to the internet.

Notable

• A government healthcare network: the addresses belong to federal facilities and staff, not to consumers or hosting customers.
• ARIN registered this ASN to the IHS in 1995, so the low number is a genuine mid-90s federal allocation rather than a reissue.

Interesting

• IHS sites are spread across reservations and rural Alaska, some of the hardest-to-reach places in the United States, so this network's edge reaches further into low-connectivity territory than most enterprise WANs.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 161.223.0.0/17
• 161.223.128.0/19
• 161.223.160.0/20
• 161.223.176.0/21
• 161.223.184.0/23
• 161.223.189.0/24
• 161.223.190.0/23
• 161.223.192.0/18
• 198.45.0.0/24
• 198.45.3.0/24
• 198.45.6.0/24
• 198.45.9.0/24
• 198.45.10.0/24
• 2607:f220:50a::/47

Upstream networks

• AS19050 U.S. Department of Health & Human Services

Adjacent networks

• AS19050 U.S. Department of Health & Human Services