AS13821 AllianceBernstein L.P.

ACML - AllianceBernstein L.P. · registered in the United States

IPv4 addresses4,60813 prefixes · <0.001% of announced IPv4

Rank in United States#4,290largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#14,328of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS13821 in ASN lookup Look up an IP in this network (103.216.134.1) All networks in United States

IPv4 prefixes

All 13 prefixes, in address order.

103.216.134.0/24
165.101.85.0/24
206.218.206.0/23
206.218.209.0/24
206.218.213.0/24
206.218.214.0/23
206.218.223.0/24
206.218.229.0/24
206.218.232.0/24
206.218.234.0/23
206.218.240.0/24
206.218.246.0/23
206.218.248.0/23

Similar-sized networks in United States

ASNNameIPv4 addresses

AS13431#4287 MILLENNIUM-AS - Millennium Partners, L.P.4,608

AS13456#4288 SPOWA-ASN - City of Spokane4,608

AS13778#4289 JOHNSON-AND-JOHNSON - Johnson & Johnson4,608

AS13831#4291 POGOZONE-OA - PogoZone4,608

AS14851#4292 BANNER-HEALTH-ARIZONA - BANNER HEALTH4,608

AS15198#4293 CCPI---SITE-1 - Convention Communications Provisioners, Inc.4,608

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