AS401728 First Commonwealth Federal Credit Union

FCFCU - First Commonwealth Federal Credit Union · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#13,543largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#62,814of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS401728 in ASN lookup Look up an IP in this network (66.186.177.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

66.186.177.0/24

IPv6 prefixes

All 1 prefix.

2620:d7:e000::/48

Similar-sized networks in United States

ASNNameIPv4 addresses

AS401642#13540 CARVERAUTO - Carver Automation Corporation256

AS401662#13541 HEIMDALLTEK - HeimdallTek256

AS401720#13542 UNREDACTED-AS - Unredacted Inc256

AS401760#13544 NETKIND - Netkind LLC256

AS401786#13545 FRACCTAL - Fracctal, Inc.256

AS401829#13546 PIPEWORKS-01 - Pipeworks Inc.256

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