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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 |
|---|---|---|---|---|
| AS23260US | SCI-AS - Midcontinent Communications | 17.4K | 65.5K | 10 |
| AS14519US | APPLIEDI - Applied Innovations Corporation | 17.4K | — | 7 |
| AS5783US | KCSOS-NET - Kern County Superintendent of Schools | 17.4K | — | 5 |
| AS46792US | PMU-PARAGOULD - Paragould Municipal Utilities | 17.4K | 65.5K | 6 |
| AS55106US | DATACATE-AS1 - Datacate Inc. | 17.4K | 4 | 33 |
| AS33199US | ASN-AMHERSTCOMM-01 - Amherst Communications | 17.4K | — | 2 |
| AS18704US | T-SYSTEMS-NA - T-Systems North America, Inc. | 17.4K | — | 7 |
| AS10594US | CEC - Cutting Edge Communications, Inc. | 17.4K | — | 6 |
| AS7926US | FICO - Fair Isaac and Company | 17.4K | — | 19 |
| AS22472US | FLCOURTS - Florida Supreme Court | 17.4K | — | 5 |
| AS46446US | CALTELCOM - California Telecom | 17.4K | — | 20 |
| AS40675US | PROQUEST - PROQUEST, LLC | 17.2K | — | 4 |
| AS31975US | SEWANEE - University of the South | 17.2K | — | 4 |
| AS398913US | NTSPARK - NT Spark, LLC | 17.2K | 65.5K | 31 |
| AS32869US | SILVERSTAR-NET - Silver Star Telecom, LLC | 17.2K | — | 13 |
| AS19955US | PINELAND-TELEPHONE - Pineland Telephone Cooperative, Inc. | 17.2K | — | 67 |
| AS54535US | NIKEUS-NV - Nike, Inc. | 17.2K | — | 46 |
| AS400238US | PIEG-01 - PIE&G | 17.2K | 4.1K | 44 |
| AS48806US | stackster Stackster LLC | 17.2K | 2 | 66 |
| AS207023US | centrixweb1 Centrix Web Services LLC | 17.2K | 524.3K | 37 |
| AS399138US | MICROLINK-CORE - Microlink Network | 17.2K | — | 22 |
| AS399647US | RUMBLE - Rumble USA Inc. | 17.2K | 4.1K | 26 |
| AS14733US | AS14733 - Barclays Capital Inc. | 17.2K | — | 47 |
| AS4261US | BLUEGRASSNET - Intermart Inc. | 17.2K | 65.5K | 6 |
| AS46115US | LUTHER - Luther College | 16.9K | — | 35 |
| AS23154US | SANMINA-SCI - Sanmina-SCI Corporation | 16.9K | — | 61 |
| AS47028US | TVC-ASN - Twin Valley Communications Inc | 16.9K | — | 10 |
| AS22944US | KCTCS-INTERNET2 - Kentucky Community and Technical College System | 16.9K | — | 3 |
| AS21617US | NARA - National Archives and Records Administration | 16.9K | — | 5 |
| AS31966US | CSAA-INSURANCE-EXCHANGE - CSAA Insurance Exchange | 16.9K | — | 21 |
| AS12247US | META-SOLUTIONS - Tri-Rivers Educational Computer Association | 16.9K | — | 11 |
| AS11687US | CITY-OF-HOPE - City of Hope Medical Center | 16.9K | — | 4 |
| AS21623US | SPACELINK - Spacelink Systems | 16.9K | 65.5K | 5 |
| AS400510US | AS-UMGTCN - United Management Group, LLC | 16.9K | 4.1K | 3 |
| AS402159US | VALLEY FIBERCOM - Valley FiberCom | 16.9K | — | 24 |
| AS36473US | CONTE-25-BLA-RST - Contegix | 16.9K | 196.6K | 17 |
| AS33138US | AS-NYPD - New York City Police Department | 16.9K | — | 3 |
| AS23376US | EN-23376 - EllumNet LLC | 16.9K | 131.1K | 10 |
| AS63242US | AS-CMN-LS - Metronet | 16.9K | — | 17 |
| AS22736US | CPS - Cincinnati | 16.6K | — | 2 |
| AS14315US | 1GSERVERS - 1GSERVERS, LLC | 16.6K | 655.4K | 59 |
| AS40403US | RCS-ASN - Rocks Computer Services, LLC | 16.6K | — | 5 |
| AS23167US | BAYER-ARCH - Bayer Corporation | 16.6K | — | 20 |
| AS14131US | DATAYARD - DataYard | 16.6K | — | 3 |
| AS398787US | GO-DADDY-COM-LLC - GoDaddy.com, LLC | 16.6K | — | 31 |
| AS46426US | HART-COMMUNICATIONS - HART COMMUNICATIONS, INC. | 16.6K | — | 16 |
| AS54163US | AHOSTING - AHOSTING | 16.6K | — | 2 |
| AS16498US | LASALLE - LaSalle University | 16.6K | — | 2 |
| AS53407US | UTOPIA-FIBER - UTOPIA | 16.6K | 65.5K | 24 |
| AS17373US | MCI-COV - Verizon Business | 16.6K | — | 5 |