AS27398 Alyeska Information Technology Services LLC

AITSL-27398 - Alyeska Information Technology Services LLC · registered in the United States

IPv4 addresses3,0723 prefixes · <0.001% of announced IPv4

Rank in United States#5,285largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#18,471of 79,396 networks with IPv4

IPv64 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS27398 in ASN lookup Look up an IP in this network (74.123.136.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

74.123.136.0/22
162.218.248.0/22
206.81.160.0/22

IPv6 prefixes

All 1 prefix.

2602:fed5::/46

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources