AS63039 Spok Inc.

USMOASN - Spok Inc. · registered in the United States

IPv4 addresses6,91214 prefixes · <0.001% of announced IPv4

Rank in United States#3,647largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#11,748of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS63039 in ASN lookup Look up an IP in this network (63.97.34.1) All networks in United States

IPv4 prefixes

All 14 prefixes, in address order.

63.97.34.0/24
147.187.0.0/23
147.187.10.0/24
147.187.12.0/22
147.187.16.0/22
147.187.100.0/24
147.187.110.0/24
147.187.112.0/23
147.187.115.0/24
147.187.116.0/22
147.187.128.0/23
147.187.130.0/24
147.187.132.0/23
147.187.255.0/24

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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