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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,001 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 160.236.231.0/24 | 256 | APNIC |  ID | 5th Aug 2026 |
| 160.236.238.0/23 | 512 | APNIC |  IN | 6th Aug 2026 |
| 160.236.24.0/23 | 512 | APNIC |  BD | 22nd Jun 2026 |
| 160.236.240.0/23 | 512 | APNIC |  PH | 6th Aug 2026 |
| 160.236.242.0/24 | 256 | APNIC |  PK | 6th Aug 2026 |
| 160.236.243.0/24 | 256 | APNIC |  HK | 7th Aug 2026 |
| 160.236.244.0/23 | 512 | APNIC |  VN | 7th Aug 2026 |
| 160.236.246.0/24 | 256 | APNIC | ID | 7th Aug 2026 |
| 160.236.247.0/24 | 256 | APNIC | IN | 10th Aug 2026 |
| 160.236.250.0/23 | 512 | APNIC |  CN | 10th Aug 2026 |
| 160.236.252.0/24 | 256 | APNIC | ID | 10th Aug 2026 |
| 160.236.253.0/24 | 256 | APNIC | ID | 10th Aug 2026 |
| 160.236.254.0/23 | 512 | APNIC |  TW | 10th Aug 2026 |
| 160.236.30.0/24 | 256 | APNIC | PH | 25th Jun 2026 |
| 160.236.32.0/23 | 512 | APNIC | IN | 25th Jun 2026 |
| 160.236.36.0/24 | 256 | APNIC | ID | 26th Jun 2026 |
| 160.236.40.0/24 | 256 | APNIC | ID | 26th Jun 2026 |
| 160.236.41.0/24 | 256 | APNIC |  KR | 30th Jun 2026 |
| 160.236.46.0/23 | 512 | APNIC | IN | 30th Jun 2026 |
| 160.236.50.0/23 | 512 | APNIC |  AU | 1st Jul 2026 |
| 160.236.54.0/24 | 256 | APNIC | IN | 1st Jul 2026 |
| 160.236.55.0/24 | 256 | APNIC | ID | 1st Jul 2026 |
| 160.236.56.0/23 | 512 | APNIC | AU | 1st Jul 2026 |
| 160.236.6.0/23 | 512 | APNIC | IN | 18th Jun 2026 |
| 160.236.60.0/23 | 512 | APNIC |  SG | 3rd Jul 2026 |
| 160.236.62.0/24 | 256 | APNIC | ID | 3rd Jul 2026 |
| 160.236.63.0/24 | 256 | APNIC | AU | 3rd Jul 2026 |
| 160.236.65.0/24 | 256 | APNIC | IN | 6th Jul 2026 |
| 160.236.66.0/23 | 512 | APNIC | BD | 5th Jul 2026 |
| 160.236.69.0/24 | 256 | APNIC | AU | 10th Jul 2026 |
| 160.236.70.0/23 | 512 | APNIC |  JP | 6th Jul 2026 |
| 160.236.74.0/23 | 512 | APNIC | PH | 7th Jul 2026 |
| 160.236.76.0/23 | 512 | APNIC | IN | 8th Jul 2026 |
| 160.236.78.0/23 | 512 | APNIC | CN | 8th Jul 2026 |
| 160.236.84.0/23 | 512 | APNIC | IN | 9th Jul 2026 |
| 160.236.88.0/24 | 256 | APNIC | ID | 10th Jul 2026 |
| 160.236.89.0/24 | 256 | APNIC | ID | 13th Jul 2026 |
| 160.236.92.0/23 | 512 | APNIC | ID | 13th Jul 2026 |
| 160.236.95.0/24 | 256 | APNIC | ID | 15th Jul 2026 |
| 160.238.101.0/24 | 256 | AFRINIC |  CI | 28th Feb 2020 |
| 160.238.11.0/24 | 256 | AFRINIC | CI | 28th Feb 2020 |
| 160.238.116.0/22 | 1k | RIPE NCC |  EE | 31st Aug 2018 |
| 160.238.148.0/22 | 1k | LACNIC |  BR | 16th May 2017 |
| 160.238.22.0/24 | 256 | ARIN |  US | 14th Sept 2017 |
| 160.238.252.0/22 | 1k | LACNIC |  CL | 15th May 2017 |
| 160.238.50.0/24 | 256 | AFRINIC | CI | 28th Feb 2020 |
| 160.238.57.0/24 | 256 | AFRINIC | CI | 28th Feb 2020 |
| 160.238.60.0/24 | 256 | RIPE NCC |  RS | 4th Oct 2019 |
| 160.238.88.0/22 | 1k | APNIC | IN | 15th Mar 2016 |
| 160.24.0.0/16 | 65.5k | APNIC | JP | 24th Jun 1992 |