AS21511 NCSBN, Inc.

NCSBN - NCSBN, Inc. · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#14,412largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#64,213of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21511 in ASN lookup Look up an IP in this network (65.248.198.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

65.248.198.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS20450#14409 THL16-ASN - Trojan Hosting, LLC.256

AS20462#14410 OPULENT-CLOUD - Opulent Cloud256

AS20479#14411 MCSO-PSC-1 - Monmouth County Sheriff's Office256

AS21514#14413 LEGACY - LEGACY MARKETING PARTNERS, L.L.C.256

AS21518#14414 INTEGRIS-HEALTH - Integris Health, Inc.256

AS21531#14415 QLRASN-1 - Quantum Leap Research LLC256

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