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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,041 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 169.128.240.0/22 | 1k | ARIN |  US | 1st Jul 2026 |
| 169.128.244.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.248.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.28.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.60.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.64.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.68.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.76.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.128.8.0/22 | 1k | ARIN |  VG | 1st Jul 2026 |
| 169.128.88.0/22 | 1k | ARIN | US | 1st Jul 2026 |
| 169.129.0.0/16 | 65.5k | AFRINIC |  ZA | 2nd Nov 1994 |
| 169.134.0.0/16 | 65.5k | ARIN | US | 4th Nov 1994 |
| 169.136.224.0/19 | 8.2k | ARIN | US | 4th Nov 1994 |
| 169.140.0.0/16 | 65.5k | APNIC |  KR | 8th Nov 1994 |
| 169.141.0.0/16 | 65.5k | ARIN | US | 8th Nov 1994 |
| 169.148.184.0/22 | 1k | ARIN | US | 11th Jan 2019 |
| 169.150.112.0/20 | 4.1k | ARIN | US | 28th Dec 2021 |
| 169.155.0.0/19 | 8.2k | ARIN | US | 3rd Jan 1995 |
| 169.155.112.0/21 | 2k | ARIN | US | 3rd Jan 1995 |
| 169.155.172.0/22 | 1k | ARIN | US | 3rd Jan 1995 |
| 169.155.176.0/20 | 4.1k | ARIN | US | 3rd Jan 1995 |
| 169.155.32.0/21 | 2k | ARIN | US | 3rd Jan 1995 |
| 169.155.40.0/22 | 1k | ARIN | US | 3rd Jan 1995 |
| 169.155.64.0/20 | 4.1k | ARIN | US | 3rd Jan 1995 |
| 169.155.80.0/21 | 2k | ARIN | US | 3rd Jan 1995 |
| 169.155.96.0/20 | 4.1k | ARIN | US | 3rd Jan 1995 |
| 169.159.0.0/18 | 16.4k | AFRINIC |  GA | 12th Nov 2014 |
| 169.16.0.0/12 | 1M | ARIN | US | 25th Aug 1993 |
| 169.176.0.0/13 | 524k | ARIN | US | 23rd Feb 1995 |
| 169.184.0.0/16 | 65.5k | ARIN | US | 23rd Feb 1995 |
| 169.185.0.0/16 | 65.5k | ARIN | US | 23rd Feb 1995 |
| 169.186.0.0/15 | 131k | ARIN | US | 23rd Feb 1995 |
| 169.188.0.0/14 | 262k | ARIN | US | 23rd Feb 1995 |
| 169.192.0.0/14 | 262k | ARIN | US | 23rd Feb 1995 |
| 169.197.135.0/24 | 256 | ARIN | US | 3rd Apr 2023 |
| 169.197.151.0/24 | 256 | ARIN | US | 15th Jan 2021 |
| 169.197.164.0/22 | 1k | ARIN |  CA | 4th Jan 2021 |
| 169.197.168.0/22 | 1k | ARIN | US | 1st Apr 2024 |
| 169.197.176.0/22 | 1k | ARIN | US | 16th Apr 2026 |
| 169.197.181.0/24 | 256 | ARIN | US | 1st Mar 2021 |
| 169.197.184.0/22 | 1k | ARIN |  PR | 5th Jan 2021 |
| 169.206.0.0/16 | 65.5k | ARIN | US | 30th Apr 1995 |
| 169.225.0.0/16 | 65.5k | ARIN | US | 14th Jun 1995 |
| 169.239.100.0/22 | 1k | AFRINIC |  ML | 22nd Oct 2015 |
| 169.239.212.0/22 | 1k | AFRINIC |  CD | 12th Feb 2016 |
| 169.239.60.0/22 | 1k | AFRINIC | ZA | 31st Aug 2015 |
| 169.242.0.0/16 | 65.5k | ARIN | US | 5th Oct 1995 |
| 169.243.0.0/16 | 65.5k | ARIN | US | 5th Oct 1995 |
| 169.245.0.0/16 | 65.5k | ARIN | US | 9th Jul 1996 |
| 169.246.0.0/15 | 131k | ARIN | US | 9th Jul 1996 |