ARIN registry — WHOIS, browse & statistics
A daily mirror of ARIN's public delegated registry (North America). Look up a resource, browse every object, or find a company's resources by name.
Single-resource lookup in ARIN’s delegated registry, enriched live from ARIN RDAP.
// what ARIN has delegated
ARIN registry at a glance
🌐
Assigned IPv4 addresses
1.65B
1,645,628,928
📦
IPv4 networks
76,687
delegated blocks
🧭
IPv6 networks
11,336
delegated blocks
🔗
Autonomous systems
34,032
ASNs
// browse the objects
Browse the ARIN registry
| Prefix | Country | Status | Allocated | Org handle |
|---|---|---|---|---|
| 2001:500:3::/48 |  US |
allocated | 2003-02-19 | 9b5b285c8eb7… |
| 2001:580::/32 | US |
allocated | 2003-02-11 | aadc0d0b499b… |
| 2001:578::/30 | US |
allocated | 2003-02-06 | 4cad11d18482… |
| 2001:570::/32 | US |
allocated | 2003-02-05 | e220ed812a4c… |
| 2001:568::/29 |  CA |
allocated | 2003-01-09 | 0e702695cc8d… |
| 2001:558::/29 | US |
allocated | 2003-01-06 | 3a7b40ab58f6… |
| 2001:560::/32 | US |
allocated | 2003-01-06 | 860fa092fe05… |
| 2001:500:2::/48 | US |
allocated | 2002-12-19 | 37fe01d6d027… |
| 2001:550::/32 | US |
allocated | 2002-12-17 | 37fe01d6d027… |
| 2001:500:1::/48 | US |
allocated | 2002-11-22 | 74e79ab870c1… |
| 2001:538::/32 | US |
allocated | 2002-11-13 | 66e68ecd93af… |
| 2001:530::/32 | US |
allocated | 2002-10-31 | 60d8a452b946… |
| 2001:520::/32 | US |
allocated | 2002-10-15 | f142900a5ac1… |
| 2001:504::/48 | US |
allocated | 2002-10-14 | fca460f9d966… |
| 2001:504:1::/48 | US |
allocated | 2002-10-14 | 2c312495609e… |
| 2001:518::/32 | US |
allocated | 2002-10-09 | 0e660f095dee… |
| 2001:510::/32 | CA |
allocated | 2002-09-30 | 119511f11274… |
| 2001:4f8::/32 | US |
allocated | 2002-08-02 | bfbf7b5fb987… |
| 2001:4e8::/32 | CA |
allocated | 2002-07-09 | f6378853cc62… |
| 2001:4e0::/32 | US |
allocated | 2002-06-12 | 6dc46da70282… |
| 2001:4d0::/32 | US |
allocated | 2002-05-01 | 1f99771bc3e2… |
| 2001:4b8::/32 | US |
allocated | 2002-01-04 | 81e05477cc28… |
| 2001:4b0::/32 | US |
allocated | 2001-11-13 | c2dfb9e7c865… |
| 2001:490::/32 | US |
allocated | 2001-07-11 | 9a276f11c0ab… |
| 2001:480::/32 | US |
allocated | 2001-06-14 | 5a1efaaa9165… |
| 2001:470::/32 | US |
allocated | 2001-03-22 | e2e9e26bea21… |
| 2001:468::/32 | US |
allocated | 2001-03-12 | 2c101a9e7e53… |
| 2001:458::/32 | US |
allocated | 2001-02-01 | 09bf42dba0c2… |
| 2001:450::/32 | US |
allocated | 2001-01-02 | e5e3b9c13678… |
| 2001:440::/32 | US |
allocated | 2000-09-29 | 37fe01d6d027… |
| 2001:438::/32 | US |
allocated | 2000-09-25 | 34d342be0361… |
| 2001:428::/32 | US |
allocated | 2000-07-12 | cdb7d42057bd… |
| 2001:420::/32 | US |
allocated | 2000-06-14 | 6f69b4fbc4a7… |
| 2001:418::/32 | US |
allocated | 2000-05-24 | 9f14454567a6… |
| 2001:410::/32 | CA |
allocated | 2000-03-27 | ff364118dcda… |
| 2001:400::/32 | US |
allocated | 1999-08-03 | 04f048163e37… |
| 2001:401::/32 | — | reserved | — | … |
| 2001:402::/31 | — | reserved | — | … |
| 2001:404::/30 | — | reserved | — | … |
| 2001:409::/32 | — | reserved | — | … |
| 2001:40a::/31 | — | reserved | — | … |
| 2001:40c::/30 | — | reserved | — | … |
| 2001:411::/32 | — | reserved | — | … |
| 2001:412::/31 | — | reserved | — | … |
| 2001:414::/30 | — | reserved | — | … |
| 2001:419::/32 | — | reserved | — | … |
| 2001:41a::/31 | — | reserved | — | … |
| 2001:41c::/30 | — | reserved | — | … |
| 2001:421::/32 | — | reserved | — | … |
| 2001:422::/31 | — | reserved | — | … |
| 2001:424::/30 | — | reserved | — | … |
| 2001:429::/32 | — | reserved | — | … |
| 2001:42a::/31 | — | reserved | — | … |
| 2001:42c::/30 | — | reserved | — | … |
| 2001:431::/32 | — | reserved | — | … |
| 2001:432::/31 | — | reserved | — | … |
| 2001:434::/30 | — | reserved | — | … |
| 2001:439::/32 | — | reserved | — | … |
| 2001:43a::/31 | — | reserved | — | … |
| 2001:43c::/30 | — | reserved | — | … |
| 2001:441::/32 | — | reserved | — | … |
| 2001:442::/31 | — | reserved | — | … |
| 2001:444::/30 | — | reserved | — | … |
| 2001:448::/32 | — | reserved | — | … |
| 2001:449::/32 | — | reserved | — | … |
| 2001:44a::/31 | — | reserved | — | … |
| 2001:44c::/30 | — | reserved | — | … |
| 2001:451::/32 | — | reserved | — | … |
| 2001:452::/31 | — | reserved | — | … |
| 2001:454::/30 | — | reserved | — | … |
| 2001:459::/32 | — | reserved | — | … |
| 2001:45a::/31 | — | reserved | — | … |
| 2001:45c::/30 | — | reserved | — | … |
| 2001:461::/32 | — | reserved | — | … |
| 2001:462::/31 | — | reserved | — | … |
| 2001:464::/30 | — | reserved | — | … |
| 2001:469::/32 | — | reserved | — | … |
| 2001:46a::/31 | — | reserved | — | … |
| 2001:46c::/30 | — | reserved | — | … |
| 2001:471::/32 | — | reserved | — | … |
| 2001:472::/31 | — | reserved | — | … |
| 2001:474::/30 | — | reserved | — | … |
| 2001:478::/32 | — | reserved | — | … |
| 2001:479::/32 | — | reserved | — | … |
| 2001:47a::/31 | — | reserved | — | … |
| 2001:47c::/30 | — | reserved | — | … |
| 2001:481::/32 | — | reserved | — | … |
| 2001:482::/31 | — | reserved | — | … |
| 2001:484::/30 | — | reserved | — | … |
| 2001:488::/29 | — | available | — | … |
| 2001:491::/32 | — | reserved | — | … |
| 2001:492::/31 | — | reserved | — | … |
| 2001:494::/30 | — | reserved | — | … |
| 2001:498::/29 | — | available | — | … |
| 2001:4a1::/32 | — | reserved | — | … |
| 2001:4a2::/31 | — | reserved | — | … |
| 2001:4a4::/30 | — | reserved | — | … |
| 2001:4a8::/29 | — | available | — | … |
| 2001:4b1::/32 | — | reserved | — | … |
| 2001:4b2::/31 | — | reserved | — | … |