AS13630 CSX Technology

CSXT-AS-1 - CSX Technology · registered in the United States

IPv4 addresses3,8404 prefixes · <0.001% of announced IPv4

Rank in United States#4,937largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#16,703of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS13630 in ASN lookup Look up an IP in this network (216.231.208.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

216.231.208.0/21
216.231.216.0/22
216.231.221.0/24
216.231.222.0/23

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AS14089#4938 CANNET - CanNet Internet Services, Inc.3,840

AS14497#4939 BITREFINERY-1 - Bit Refinery, LLC3,840

AS15008#4940 AISG - AISG3,840

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