AS398856 Group M Worldwide, LLC

WPP-DETROIT - Group M Worldwide, LLC · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#17,569largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#78,486of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS398856 in ASN lookup Look up an IP in this network (209.90.42.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

209.90.42.0/24

Other ASNs named Group M Worldwide, LLC

2 other networks use the same organisation name; together with AS398856 they announce 3,072 IPv4 addresses.

ASNNameIPv4 addresses

AS26470WPP-IT-PISCATAWAY - Group M Worldwide, LLC US2,560

AS398018WPP-IT-CHICAGO - Group M Worldwide, LLC US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS398832#17566 STRAYANET-01 - Strayanet LLC.256

AS398841#17567 AVERITT-IP-BLOCK - Averitt Express, INC256

AS398845#17568 MCC-WACO - McLennan Community College256

AS398867#17570 OREGON-IDAHO-UTIL - Oregon-Idaho Utilities, Inc.256

AS398881#17571 SFG-199-33-226 - SFG, LLC256

AS398886#17572 PEC-AS-01 - Progressive Expert Consulting, Inc.256

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