AS138947 NORTHERN TRUST CORPORATION

NTC-AS-APC - NORTHERN TRUST CORPORATION · registered in the United States

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in United States#11,941largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#54,022of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS138947 in ASN lookup Look up an IP in this network (103.124.128.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

103.124.128.0/23

Other ASNs named NORTHERN TRUST CORPORATION

3 other networks use the same organisation name; together with AS138947 they announce 1,536 IPv4 addresses.

ASNNameIPv4 addresses

AS138948NTC-AS-APD - NORTHERN TRUST CORPORATION US512

AS138938NTC-AS-INPE - NORTHERN TRUST CORPORATION US256

AS150802NTC-AS-INBAG - NORTHERN TRUST CORPORATION US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS64296#11938 ONRADINC - Onrad, Inc.512

AS136768#11939 VMTECHINC-AS-AP - VMTECH INC512

AS136806#11940 TII-AS-IN - Texas Instruments, Inc512

AS138948#11942 NTC-AS-APD - NORTHERN TRUST CORPORATION512

AS153453#11943 HONGSHIN-AS-AP - Hongshin, Inc.512

AS155029#11944 HOSTHATCH-AS-AP - HostHatch Korea512

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