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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
85,001 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 160.240.0.0/15 | 131k | APNIC |  JP | 19th Apr 1993 |
| 160.243.0.0/16 | 65.5k | APNIC | JP | 19th Apr 1993 |
| 160.244.0.0/16 | 65.5k | APNIC | JP | 21st Dec 1992 |
| 160.248.13.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.176.0/21 | 2k | APNIC | JP | 19th Apr 1993 |
| 160.248.202.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.206.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.224.0/21 | 2k | APNIC | JP | 19th Apr 1993 |
| 160.248.236.0/22 | 1k | APNIC | JP | 19th Apr 1993 |
| 160.248.240.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.254.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.70.0/23 | 512 | APNIC | JP | 19th Apr 1993 |
| 160.248.72.0/23 | 512 | APNIC | JP | 19th Apr 1993 |
| 160.248.82.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.85.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.86.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.248.89.0/24 | 256 | APNIC | JP | 19th Apr 1993 |
| 160.25.10.0/23 | 512 | APNIC |  CN | 27th Jun 2024 |
| 160.25.12.0/23 | 512 | APNIC | CN | 27th Jun 2024 |
| 160.25.122.0/23 | 512 | APNIC |  IN | 5th Jul 2024 |
| 160.25.126.0/23 | 512 | APNIC |  ID | 5th Jul 2024 |
| 160.25.150.0/23 | 512 | APNIC |  VN | 9th Jul 2024 |
| 160.25.153.0/24 | 256 | APNIC | ID | 10th Jul 2024 |
| 160.25.188.0/23 | 512 | APNIC |  BD | 12th Jul 2024 |
| 160.25.198.0/23 | 512 | APNIC | ID | 16th Jul 2024 |
| 160.25.204.0/23 | 512 | APNIC | ID | 16th Jul 2024 |
| 160.25.210.0/23 | 512 | APNIC |  PH | 16th Jul 2024 |
| 160.25.246.0/23 | 512 | APNIC | ID | 18th Jul 2024 |
| 160.25.44.0/24 | 256 | APNIC | IN | 1st Jul 2024 |
| 160.25.64.0/23 | 512 | APNIC | IN | 1st Jul 2024 |
| 160.25.86.0/23 | 512 | APNIC | VN | 3rd Jul 2024 |
| 160.25.90.0/23 | 512 | APNIC | IN | 3rd Jul 2024 |
| 160.250.0.0/23 | 512 | APNIC | VN | 13th Nov 2024 |
| 160.250.102.0/23 | 512 | APNIC | CN | 27th Nov 2024 |
| 160.250.104.0/23 | 512 | APNIC | CN | 28th Nov 2024 |
| 160.250.112.0/23 | 512 | APNIC | ID | 29th Nov 2024 |
| 160.250.142.0/23 | 512 | APNIC |  AU | 2nd Dec 2024 |
| 160.250.146.0/23 | 512 | APNIC | IN | 2nd Dec 2024 |
| 160.250.16.0/23 | 512 | APNIC | CN | 15th Nov 2024 |
| 160.250.160.0/23 | 512 | APNIC | CN | 3rd Dec 2024 |
| 160.250.168.0/24 | 256 | APNIC | ID | 5th Dec 2024 |
| 160.250.170.0/23 | 512 | APNIC | CN | 5th Dec 2024 |
| 160.250.18.0/23 | 512 | APNIC | CN | 15th Nov 2024 |
| 160.250.2.0/23 | 512 | APNIC | VN | 13th Nov 2024 |
| 160.250.208.0/23 | 512 | APNIC | IN | 11th Dec 2024 |
| 160.250.214.0/23 | 512 | APNIC | CN | 12th Dec 2024 |
| 160.250.220.0/23 | 512 | APNIC |  LA | 12th Dec 2024 |
| 160.250.236.0/23 | 512 | APNIC | IN | 17th Dec 2024 |
| 160.250.250.0/23 | 512 | APNIC | VN | 19th Dec 2024 |
| 160.250.252.0/23 | 512 | APNIC | CN | 20th Dec 2024 |