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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) | 227.4M | 3,133 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 217.9M | 24,372 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 643 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.7M | 1,322 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) |
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.
32,235 autonomous systems registered to United States. Click an AS for detail.
| 72.9M |
| 229 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.6M | 3,906 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.9M | 2,006 |
| AS701US | UUNET - Verizon Business | 43.6M | 993 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.7M | 4,275 |
| 66.6K |
| — |
| 5 |
| AS320US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 66.6K | 256 | 3 |
| AS11827US | WSU-PUL-AS - Washington State University | 66.6K | 256 | 16 |
| AS396362US | LEASEWEB-USA-NYC - Leaseweb USA, Inc. | 66.6K | 327.7K | 73 |
| AS18777US | TEXAS-STATE-UNIVERSITY - Texas State University | 66.6K | — | 5 |
| AS11042US | NTHL - NETWORK TRANSIT HOLDINGS LLC | 66.6K | 127K | 102 |
| AS33523US | ROWANUNIVERSITY - Rowan University | 66.6K | — | 4 |
| AS25899US | LSNET - LS Networks | 66.6K | 131.1K | 42 |
| AS32064US | AMUAS1 - American University | 66.6K | 16 | 5 |
| AS55013US | MTSSYSTEMSCORP - MTS Systems Corporation | 66.6K | — | 5 |
| AS395877US | CITYOFTEMPE - City of Tempe, Arizona | 66.6K | — | 2 |
| AS25640US | HAWAII-DEPT-OF-EDUC - Hawaii Department of Education | 66.6K | — | 5 |
| AS7905US | SOONER-AS - Sooner Technology | 66.6K | — | 4 |
| AS27198US | INDIANA-EXTERNAL - Indiana University | 66.8K | — | 7 |
| AS33632US | MSU-EAGLE - Morehead State University | 66.8K | — | 4 |
| AS32000US | AS32000 - Tnet Broadband Internet | 66.8K | — | 3 |
| AS22693US | NERIC - Albany Schoharie Schenectady BOCES | 66.8K | — | 3 |
| AS14852US | DCX - DaimlerChrysler Corporation | 66.8K | — | 6 |
| AS3152US | FNAL-AS - Fermi National Accelerator Laboratory (Fermilab) | 66.8K | 1 | 4 |
| AS1559US | DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) | 66.8K | — | 3 |
| AS32073US | MCPS-K12-MD-US - Montgomery County Public Schools | 66.8K | — | 15 |
| AS40246US | NMSU - New Mexico State University | 66.8K | 65.5K | 7 |
| AS22498US | PINELLAS-COUNTY - Pinellas County Government | 66.8K | — | 8 |
| AS33348US | PIERCE-COUNTY - Pierce County | 66.8K | — | 6 |
| AS23282US | COUNTYOFSB - Santa Barbara County | 66.8K | — | 6 |
| AS1932US | CONED - Consolidated Edison Co. of New York, Inc. | 66.8K | — | 6 |
| AS16860US | ASN-HEALT-82 - HealthPlan Services, Inc. | 66.8K | — | 6 |
| AS3599US | BINCNET - CDW Technologies LLC | 66.8K | 66.3K | 18 |
| AS33503US | MCW-1-AS - Medical College of Wisconsin | 66.8K | 16 | 7 |
| AS400117US | APOG-MWSU - Apogee Telecom Inc. | 66.8K | — | 5 |
| AS324US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 66.8K | 512 | 8 |
| AS20326US | TERASWITCH - TeraSwitch Networks Inc. | 66.8K | 1.9K | 181 |
| AS328US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 67.1K | — | 7 |
| AS22809US | AMFAM-INS - American Family Insurance | 67.1K | — | 19 |
| AS55194US | BGSU - Bowling Green State University | 67.1K | 65.6K | 9 |
| AS36444US | NEXCESS-NET - Liquid Web, L.L.C | 67.1K | 65.8K | 90 |
| AS395421US | OKSTATE - Oklahoma State University | 67.1K | 16 | 4 |
| AS42808US | VIRTELA-NET-VNLAMS1 NTT Global Networks Incorporated | 67.3K | — | 8 |
| AS194US | UCAR-AS - University Corporation for Atmospheric Research | 67.3K | 256 | 6 |
| AS12229US | SAS-WHQ - SAS Institute, Inc. | 67.3K | — | 6 |
| AS14789US | CLOUDFLARENET - Cloudflare, Inc. | 67.3K | 259 | 522 |
| AS687US | DNIC-AS-00687 - United States Department of Defense (DoD) | 67.3K | 1 | 6 |
| AS46103US | UWW-EDU-ASN - University of Wisconsin Whitewater | 67.3K | 65.5K | 7 |
| AS394990US | STRATUS - Stratus Technologies, Inc. | 67.3K | — | 8 |
| AS7800US | ALLINA-HEALTH-SYSTEM-INC - Allina Health System, Inc. | 67.3K | — | 5 |
| AS393559US | WEBBING-USA - WEBBING USA, INC. | 67.6K | 1.3K | 171 |
| AS33194US | CAS-AUTONOMOUS-SYSTEM - Chemical Abstracts Service | 67.6K | — | 9 |