AS394056 BIF IV

BIFIV - BIF IV · registered in the United States

IPv4 addresses2,8163 prefixes · <0.001% of announced IPv4

Rank in United States#5,435largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#19,232of 79,396 networks with IPv4

IPv665,532 x /4814 prefixes

CountryUnited States18,679 ASNs registered there

Open AS394056 in ASN lookup Look up an IP in this network (66.33.8.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

66.33.8.0/21
72.57.0.0/23
72.57.2.0/24

IPv6 prefixes

All 14 prefixes.

2607:3640::/33
2607:3640:8000::/34
2607:3640:c000::/35
2607:3640:e000::/36
2607:3640:f000::/37
2607:3640:f800::/38
2607:3640:fc00::/39
2607:3640:fe00::/40
2607:3640:ff00::/41
2607:3640:ff80::/42
2607:3640:ffc0::/45
2607:3640:ffc8::/46
2607:3640:ffd0::/44
2607:3640:ffe0::/43

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AS23961#5436 MNI-AS-AP - Misaka Network, Inc.2,816

AS63252#5437 HCDL-PHOENIX-DATA-CENTER - H5 Data Centers2,816

AS46997#5438 NATOLAB - Black Mesa Corporation2,816

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