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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
Browse by registry
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Countries with unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,580 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 163.128.158.0/23 | 512 | APNIC |  ID | 7th Apr 2026 |
| 163.128.168.0/23 | 512 | APNIC |  IN | 7th Apr 2026 |
| 163.128.17.0/24 | 256 | APNIC | ID | 6th Mar 2026 |
| 163.128.174.0/23 | 512 | APNIC | IN | 8th Apr 2026 |
| 163.128.182.0/24 | 256 | APNIC |  PH | 9th Apr 2026 |
| 163.128.190.0/24 | 256 | APNIC |  VU | 10th Apr 2026 |
| 163.128.191.0/24 | 256 | APNIC | ID | 10th Apr 2026 |
| 163.128.194.0/24 | 256 | APNIC |  AU | 10th Apr 2026 |
| 163.128.195.0/24 | 256 | APNIC | ID | 10th Apr 2026 |
| 163.128.207.0/24 | 256 | APNIC | ID | 11th Apr 2026 |
| 163.128.222.0/23 | 512 | APNIC | IN | 13th Apr 2026 |
| 163.128.224.0/23 | 512 | APNIC | IN | 13th Apr 2026 |
| 163.128.228.0/23 | 512 | APNIC | IN | 14th Apr 2026 |
| 163.128.232.0/23 | 512 | APNIC | IN | 14th Apr 2026 |
| 163.128.236.0/23 | 512 | APNIC |  CN | 15th Apr 2026 |
| 163.128.241.0/24 | 256 | APNIC | ID | 16th Apr 2026 |
| 163.128.244.0/23 | 512 | APNIC | AU | 16th Apr 2026 |
| 163.128.246.0/24 | 256 | APNIC |  MY | 17th Apr 2026 |
| 163.128.247.0/24 | 256 | APNIC | AU | 17th Apr 2026 |
| 163.128.250.0/23 | 512 | APNIC | IN | 17th Apr 2026 |
| 163.128.26.0/23 | 512 | APNIC |  JP | 9th Mar 2026 |
| 163.128.30.0/23 | 512 | APNIC | CN | 9th Mar 2026 |
| 163.128.4.0/23 | 512 | APNIC |  MN | 3rd Mar 2026 |
| 163.128.40.0/23 | 512 | APNIC | PH | 10th Mar 2026 |
| 163.128.58.0/23 | 512 | APNIC | ID | 16th Mar 2026 |
| 163.128.62.0/23 | 512 | APNIC |  SG | 16th Mar 2026 |
| 163.128.67.0/24 | 256 | APNIC | IN | 16th Mar 2026 |
| 163.128.68.0/24 | 256 | APNIC | IN | 16th Mar 2026 |
| 163.128.70.0/23 | 512 | APNIC | ID | 17th Mar 2026 |
| 163.128.80.0/23 | 512 | APNIC | IN | 18th Mar 2026 |
| 163.128.82.0/23 | 512 | APNIC | ID | 18th Mar 2026 |
| 163.128.84.0/23 | 512 | APNIC | IN | 18th Mar 2026 |
| 163.128.94.0/24 | 256 | APNIC |  BD | 20th Mar 2026 |
| 163.128.96.0/24 | 256 | APNIC |  BT | 23rd Mar 2026 |
| 163.128.97.0/24 | 256 | APNIC | AU | 23rd Mar 2026 |
| 163.132.0.0/16 | 65.5k | APNIC | JP | 30th Nov 1992 |
| 163.133.0.0/16 | 65.5k | APNIC | JP | 30th Nov 1992 |
| 163.136.0.0/16 | 65.5k | APNIC | JP | 30th Nov 1992 |
| 163.141.0.0/16 | 65.5k | APNIC | JP | 30th Nov 1992 |
| 163.146.0.0/16 | 65.5k | APNIC | JP | 30th Nov 1992 |
| 163.147.0.0/16 | 65.5k | APNIC | JP | 30th Nov 1992 |
| 163.149.0.0/16 | 65.5k | APNIC | JP | 1st Dec 1992 |
| 163.217.0.0/16 | 65.5k | APNIC | JP | 12th Apr 1993 |
| 163.219.0.0/16 | 65.5k | APNIC | JP | 12th Apr 1993 |
| 163.220.160.0/20 | 4.1k | APNIC | JP | 2nd Apr 1993 |
| 163.223.100.0/24 | 256 | APNIC | ID | 13th Mar 2025 |
| 163.223.124.0/23 | 512 | APNIC | CN | 17th Mar 2025 |
| 163.223.148.0/23 | 512 | APNIC |  TL | 19th Mar 2025 |
| 163.223.168.0/23 | 512 | APNIC | IN | 20th Mar 2025 |
| 163.223.170.0/23 | 512 | APNIC | IN | 20th Mar 2025 |