Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,310 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2401:f7a0::/32 | 4.3B × /64 | APNIC |  ID | 20th Mar 2025 |
| 2401:f7c0::/32 | 4.3B × /64 | APNIC |  CN | 10th Nov 2017 |
| 2401:f820::/32 | 4.3B × /64 | APNIC |  JP | 21st Mar 2025 |
| 2401:f840::/32 | 4.3B × /64 | APNIC |  PK | 10th Nov 2017 |
| 2401:f8a0::/32 | 4.3B × /64 | APNIC |  NP | 24th Mar 2025 |
| 2401:f8e0::/32 | 4.3B × /64 | APNIC |  IN | 24th Mar 2025 |
| 2401:f900::/32 | 4.3B × /64 | APNIC |  SG | 19th Sept 2011 |
| 2401:f960::/32 | 4.3B × /64 | APNIC | SG | 25th Mar 2025 |
| 2401:f980::/32 | 4.3B × /64 | APNIC | ID | 29th Jan 2015 |
| 2401:fa0::/32 | 4.3B × /64 | APNIC |  VN | 23rd Jun 2023 |
| 2401:fa80::/32 | 4.3B × /64 | APNIC | CN | 29th Jan 2015 |
| 2401:faa0::/32 | 4.3B × /64 | APNIC | SG | 4th Apr 2025 |
| 2401:fb20::/32 | 4.3B × /64 | APNIC | IN | 8th Apr 2025 |
| 2401:fb40::/32 | 4.3B × /64 | APNIC | IN | 14th Nov 2017 |
| 2401:fb80::/32 | 4.3B × /64 | APNIC | CN | 29th Jan 2015 |
| 2401:fc60::/32 | 4.3B × /64 | APNIC | CN | 9th Apr 2025 |
| 2401:fc80::/32 | 4.3B × /64 | APNIC | CN | 2nd Feb 2015 |
| 2401:fca0::/32 | 4.3B × /64 | APNIC | IN | 9th Apr 2025 |
| 2401:fd00::/32 | 4.3B × /64 | APNIC |  MY | 19th Sept 2011 |
| 2401:fd21::/32 | 4.3B × /64 | APNIC |  HK | 15th Apr 2026 |
| 2401:fd22::/31 | 8.6B × /64 | APNIC | HK | 15th Apr 2026 |
| 2401:fda0::/32 | 4.3B × /64 | APNIC |  BD | 11th Apr 2025 |
| 2401:fe00::/32 | 4.3B × /64 | APNIC |  AU | 3rd May 2010 |
| 2401:fe0::/32 | 4.3B × /64 | APNIC | VN | 23rd Jun 2023 |
| 2401:fe20::/32 | 4.3B × /64 | APNIC |  BT | 15th Apr 2025 |
| 2401:fe60::/32 | 4.3B × /64 | APNIC | HK | 16th Apr 2025 |
| 2401:fea0::/32 | 4.3B × /64 | APNIC |  MM | 16th Apr 2025 |
| 2401:ffc0::/32 | 4.3B × /64 | APNIC | CN | 16th Nov 2017 |
| 2402:1000::/32 | 4.3B × /64 | APNIC | CN | 2nd Nov 2007 |
| 2402:1020::/32 | 4.3B × /64 | APNIC | IN | 10th Jun 2025 |
| 2402:1040::/32 | 4.3B × /64 | APNIC | PK | 24th Nov 2017 |
| 2402:1080::/32 | 4.3B × /64 | APNIC | IN | 19th Feb 2015 |
| 2402:10c0::/32 | 4.3B × /64 | APNIC | AU | 25th Nov 2017 |
| 2402:1140::/32 | 4.3B × /64 | APNIC | AU | 25th Nov 2017 |
| 2402:1160::/32 | 4.3B × /64 | APNIC | CN | 13th Jun 2025 |
| 2402:11c0::/32 | 4.3B × /64 | APNIC | HK | 27th Nov 2017 |
| 2402:11e0::/32 | 4.3B × /64 | APNIC | IN | 23rd Jun 2025 |
| 2402:1220::/32 | 4.3B × /64 | APNIC |  NU | 24th Jun 2025 |
| 2402:1240::/32 | 4.3B × /64 | APNIC | HK | 27th Nov 2017 |
| 2402:12a0::/32 | 4.3B × /64 | APNIC | IN | 26th Jun 2025 |
| 2402:12e0::/32 | 4.3B × /64 | APNIC | ID | 27th Jun 2025 |
| 2402:1300::/32 | 4.3B × /64 | APNIC | AU | 29th Sept 2011 |
| 2402:1320::/32 | 4.3B × /64 | APNIC | PK | 27th Jun 2025 |
| 2402:1340::/32 | 4.3B × /64 | APNIC | BD | 27th Nov 2017 |
| 2402:1360::/32 | 4.3B × /64 | APNIC |  TW | 30th Jun 2025 |
| 2402:13a0::/32 | 4.3B × /64 | APNIC | TW | 30th Jun 2025 |
| 2402:13c0::/32 | 4.3B × /64 | APNIC | AU | 27th Nov 2017 |
| 2402:13e0::/32 | 4.3B × /64 | APNIC | IN | 2nd Jul 2025 |
| 2402:14a0::/32 | 4.3B × /64 | APNIC | PK | 4th Jul 2025 |
| 2402:14c0::/32 | 4.3B × /64 | APNIC | CN | 27th Nov 2017 |