AS19586 First City Internet, LLC

FIRST-CITY-INTERNET - First City Internet, LLC · registered in the United States

IPv4 addresses2,0482 prefixes · <0.001% of announced IPv4

Rank in United States#6,085largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#22,573of 79,396 networks with IPv4

IPv68 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS19586 in ASN lookup Look up an IP in this network (204.15.112.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

204.15.112.0/22
208.73.116.0/22

IPv6 prefixes

All 1 prefix.

2602:fb8c::/45

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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