AS16433 NORTH CENTRAL TELEPHONE COOPERATIVE CORPORATION

NCTC-ISP - NORTH CENTRAL TELEPHONE COOPERATIVE CORPORATION · registered in the United States

IPv4 addresses65,28028 prefixes · 0.002% of announced IPv4

Rank in United States#1,315largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,463of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS16433 in ASN lookup Look up an IP in this network (66.38.4.1) All networks in United States

IPv4 prefixes

All 28 prefixes, in address order.

66.38.4.0/23
66.38.40.0/22
66.38.96.0/19
72.22.112.0/20
74.50.40.0/22
74.50.44.0/24
74.123.40.0/21
104.243.64.0/20
147.92.16.0/20
147.160.136.0/23
160.79.16.0/20
161.38.224.0/20
162.43.208.0/20
162.217.212.0/22
162.251.220.0/22
167.224.56.0/21
170.176.248.0/21
173.214.0.0/19
173.240.128.0/20
192.190.226.0/23
198.89.28.0/22
204.9.4.0/22
208.76.160.0/21
216.20.144.0/21
216.20.152.0/22
216.20.156.0/24
216.20.157.0/24
216.20.158.0/23

IPv6 prefixes

All 1 prefix.

2605:f00::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS3634#1313 SFASU-AS - Stephen F. Austin State University65,280

AS10508#1314 UARK-FAYETTEVILLE - University of Arkansas65,280

AS33343#1316 HCHBNET - U.S. Department of Commerce, HQ and ITA65,280

AS320#1317 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)65,280

AS348#1318 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)65,280

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