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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,041 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 162.4.110.0/23 | 512 | APNIC |  IN | 11th May 2026 |
| 162.4.114.0/23 | 512 | APNIC |  HK | 12th May 2026 |
| 162.4.120.0/23 | 512 | APNIC |  TW | 13th May 2026 |
| 162.4.130.0/23 | 512 | APNIC | IN | 14th May 2026 |
| 162.4.150.0/23 | 512 | APNIC |  PK | 20th May 2026 |
| 162.4.156.0/23 | 512 | APNIC | IN | 20th May 2026 |
| 162.4.158.0/23 | 512 | APNIC |  ID | 20th May 2026 |
| 162.4.160.0/23 | 512 | APNIC |  VN | 21st May 2026 |
| 162.4.164.0/23 | 512 | APNIC | IN | 21st May 2026 |
| 162.4.167.0/24 | 256 | APNIC | ID | 25th May 2026 |
| 162.4.168.0/23 | 512 | APNIC |  CN | 22nd May 2026 |
| 162.4.183.0/24 | 256 | APNIC | ID | 25th May 2026 |
| 162.4.184.0/23 | 512 | APNIC |  PH | 25th May 2026 |
| 162.4.190.0/24 | 256 | APNIC |  DK | 26th May 2026 |
| 162.4.191.0/24 | 256 | APNIC | PH | 26th May 2026 |
| 162.4.198.0/23 | 512 | APNIC | CN | 28th May 2026 |
| 162.4.200.0/23 | 512 | APNIC | VN | 1st Jun 2026 |
| 162.4.202.0/23 | 512 | APNIC | CN | 1st Jun 2026 |
| 162.4.204.0/23 | 512 | APNIC | HK | 2nd Jun 2026 |
| 162.4.206.0/24 | 256 | APNIC |  AU | 4th Jun 2026 |
| 162.4.207.0/24 | 256 | APNIC | AU | 5th Jun 2026 |
| 162.4.212.0/23 | 512 | APNIC | ID | 5th Jun 2026 |
| 162.4.230.0/23 | 512 | APNIC | CN | 10th Jun 2026 |
| 162.4.234.0/23 | 512 | APNIC | IN | 11th Jun 2026 |
| 162.4.238.0/24 | 256 | APNIC |  JP | 12th Jun 2026 |
| 162.4.239.0/24 | 256 | APNIC | ID | 12th Jun 2026 |
| 162.4.242.0/24 | 256 | APNIC | ID | 12th Jun 2026 |
| 162.4.244.0/23 | 512 | APNIC | IN | 12th Jun 2026 |
| 162.4.248.0/23 | 512 | APNIC | PH | 16th Jun 2026 |
| 162.4.254.0/23 | 512 | APNIC | PH | 17th Jun 2026 |
| 162.4.28.0/23 | 512 | APNIC | JP | 22nd Apr 2026 |
| 162.4.30.0/23 | 512 | APNIC | ID | 22nd Apr 2026 |
| 162.4.46.0/24 | 256 | APNIC | ID | 28th Apr 2026 |
| 162.4.47.0/24 | 256 | APNIC | ID | 29th Apr 2026 |
| 162.4.50.0/23 | 512 | APNIC |  KR | 29th Apr 2026 |
| 162.4.54.0/23 | 512 | APNIC | CN | 29th Apr 2026 |
| 162.4.59.0/24 | 256 | APNIC |  BD | 30th Apr 2026 |
| 162.4.60.0/23 | 512 | APNIC | BD | 30th Apr 2026 |
| 162.4.62.0/24 | 256 | APNIC | ID | 30th Apr 2026 |
| 162.4.71.0/24 | 256 | APNIC | ID | 4th May 2026 |
| 162.4.76.0/23 | 512 | APNIC |  SG | 5th May 2026 |
| 162.4.79.0/24 | 256 | APNIC | JP | 5th May 2026 |
| 162.4.8.0/23 | 512 | APNIC | VN | 21st Apr 2026 |
| 162.4.85.0/24 | 256 | APNIC | PH | 7th May 2026 |
| 162.4.90.0/23 | 512 | APNIC | ID | 7th May 2026 |
| 162.4.92.0/24 | 256 | APNIC | TW | 7th May 2026 |
| 162.4.93.0/24 | 256 | APNIC | IN | 8th May 2026 |
| 162.43.199.0/24 | 256 | ARIN |  US | 4th Feb 2021 |
| 162.48.0.0/16 | 65.5k | ARIN | US | 27th Jul 1992 |
| 162.49.0.0/16 | 65.5k | ARIN | US | 28th Jul 1992 |