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How United States ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United States over time.
The largest autonomous systems registered to United States by IPv4 footprint.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS749US | DNIC-AS-00749 - United States Department of Defense (DoD) | 227.5M | 3,133 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 217.9M | 23,731 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 644 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.6M | 1,300 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | 73.1M | 232 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.5M | 3,838 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 1,995 |
| AS701US | UUNET - Verizon Business | 43.6M | 995 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,313 |
United States against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
32,144 autonomous systems registered to United States. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS397360US | TSTCH-ASN - Texas State Technical College Harlingen | 14.8K | — | 13 |
| AS32278US | GETWIRELESS - Getwireless.net | 14.8K | 65.6K | 39 |
| AS22427US | GNET-AS - GNET INC. | 14.8K | — | 58 |
| AS4546US | SPGI-AS - S&P Global Inc. | 14.7K | — | 48 |
| AS18794US | RAMAPO-COLLEGE - Ramapo College of New Jersey | 14.6K | — | 4 |
| AS10444US | ZB NATIONAL ASSOCIATION - ZB, National Association | 14.6K | — | 27 |
| AS396097US | SAIL-INET - Sail Internet, Inc. | 14.6K | 65.8K | 21 |
| AS394991US | ASN-SWC - SWC TELESOLUTIONS, INC. | 14.6K | — | 28 |
| AS22438US | CLEAR-RATE-COMMUNICATIONS - Clear Rate Communications, Inc. | 14.6K | 65.5K | 11 |
| AS14782US | THEROCKETSCIENCEGROUP - MailChimp | 14.6K | — | 57 |
| AS14755US | MHO - MHO Networks | 14.6K | — | 6 |
| AS26793US | ICS-LLC - ICS Advanced Technologies | 14.6K | 32.8K | 59 |
| AS213954US | GTS-AS Global Transit Systems LLC | 14.6K | — | 44 |
| AS63360US | AS-PERTINO - Cradlepoint, Inc. | 14.6K | — | 35 |
| AS7359US | CENTURYLINK-SPA-ZUNI - CenturyLink Communications, LLC | 14.6K | 1 | 5 |
| AS46694US | ASN-SPTC - South Plains Telephone Cooperative, Inc. | 14.6K | 65.5K | 19 |
| AS26211US | PROOFPOINT-ASN-US-WEST - Proofpoint, Inc. | 14.6K | 4 | 55 |
| AS30247US | VOONAMI - Voonami, Inc. | 14.6K | 66.1K | 20 |
| AS394778US | NEMR - Northeast Missouri Rural Telephone Co. | 14.6K | 65.5K | 42 |
| AS40824US | WZ-US-40824 - Webzilla Inc. | 14.6K | 65.5K | 39 |
| AS15117US | ANHEUSER-BUSCH - Anheuser-Busch Companies Inc. | 14.6K | — | 11 |
| AS22794US | AQR - AQR CAPITAL MANAGEMENT LLC | 14.3K | — | 14 |
| AS4015US | CENTURYLINK-LEGACY-QWEST-SPA-OMAHA - CenturyLink Communications, LLC | 14.3K | 1 | 5 |
| AS14188US | ASHLANDFIBERNETWORK - Ashland Fiber Network | 14.3K | — | 11 |
| AS30081US | CACHENETWORKS - CacheFly | 14.3K | 65.6K | 96 |
| AS22878US | ASACENET1 - ACENET, INC. | 14.3K | — | 5 |
| AS55145US | ECVTD-55145 - ECFiber | 14.3K | — | 9 |
| AS21699US | IO - IO INC | 14.3K | 16.4K | 56 |
| AS4459US | KDDIA-NET - KDDI America Inc. | 14.3K | 1 | 23 |
| AS12178US | INTERNAP-2BLK - Unitas Global | 14.3K | 65.5K | 8 |
| AS36378US | NYIT-AS - New York Institute of Technology | 14.3K | — | 4 |
| AS13765US | NEDELCO - Nedelco Inc. | 14.3K | 65.5K | 5 |
| AS27552US | TWDX - TowardEX Technologies International, Inc. | 14.3K | 69.9K | 16 |
| AS33097US | VOLOCU - Volo Broadband | 14.3K | — | 18 |
| AS19215US | ENERGIZE - PES Energize | 14.3K | — | 29 |
| AS10367US | FIBERCAST - Fibercast Corporation | 14.3K | — | 26 |
| AS15317US | SERVEREL-AS - Serverel Inc. | 14.3K | 65.5K | 7 |
| AS55214US | COAST - Coast Communications Company | 14.3K | — | 15 |
| AS32701US | AS-VANGUARD - The Vanguard Group, Inc. | 14.3K | — | 56 |
| AS40755US | PROTEK-COMMUNICATIONS - ProTek Communications, LLC | 14.3K | — | 11 |
| AS21873US | NEWMN - Northeast Service Cooperative (ASN-NEWMN) | 14.3K | — | 25 |
| AS1423US | RAINBOW-RTCA - Rainbow Communications, L.L.C. | 14.3K | — | 4 |
| AS11516US | ASN-ESB - Eastern Suffolk BOCES | 14.3K | — | 56 |
| AS21669US | NJ-STATEWIDE-LIBRARY-NETWORK - New Jersey State Library | 14.3K | — | 25 |
| AS11740US | PROGRESSIVE-AS - Progressive Casualty Insurance Company | 14.3K | — | 10 |
| AS30437US | GE-MS003 - General Electric Company | 14.1K | — | 52 |
| AS21922US | WEBNET - WorldSpice Technologies | 14.1K | 65.5K | 11 |
| AS27365US | CENGAGE-OHCIN - Cengage Learning, Inc. | 14.1K | — | 27 |
| AS399122US | AS-VPSHOUSE - VPS House Technology Group LLC | 14.1K | 74 | 92 |
| AS30640US | ETHERIC - Etheric Networks, Inc. | 14.1K | 65.5K | 14 |