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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,584 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.81.8.0/22 | 1k | RIPE NCC |  AT | 16th May 2019 |
| 45.82.116.0/22 | 1k | RIPE NCC |  HK | 23rd May 2019 |
| 45.82.12.0/24 | 256 | RIPE NCC |  RU | 21st May 2019 |
| 45.82.204.0/22 | 1k | RIPE NCC | AT | 24th May 2019 |
| 45.82.208.0/22 | 1k | RIPE NCC |  FR | 24th May 2019 |
| 45.82.24.0/22 | 1k | RIPE NCC |  DE | 22nd May 2019 |
| 45.82.248.0/22 | 1k | RIPE NCC |  CY | 27th May 2019 |
| 45.82.252.0/22 | 1k | RIPE NCC | CY | 27th May 2019 |
| 45.82.36.0/22 | 1k | RIPE NCC |  CH | 22nd May 2019 |
| 45.82.57.0/24 | 256 | RIPE NCC |  NL | 22nd May 2019 |
| 45.82.58.0/23 | 512 | RIPE NCC | NL | 22nd May 2019 |
| 45.83.112.0/22 | 1k | RIPE NCC |  CZ | 27th May 2019 |
| 45.83.128.0/22 | 1k | RIPE NCC | CY | 27th May 2019 |
| 45.83.140.0/22 | 1k | RIPE NCC | CY | 27th May 2019 |
| 45.83.148.0/22 | 1k | RIPE NCC | CY | 27th May 2019 |
| 45.83.196.0/22 | 1k | RIPE NCC | DE | 28th May 2019 |
| 45.83.200.0/22 | 1k | RIPE NCC | NL | 28th May 2019 |
| 45.83.208.0/22 | 1k | RIPE NCC | NL | 28th May 2019 |
| 45.83.252.0/22 | 1k | RIPE NCC | AT | 28th May 2019 |
| 45.83.52.0/22 | 1k | RIPE NCC |  EE | 27th May 2019 |
| 45.83.80.0/22 | 1k | RIPE NCC |  ES | 27th May 2019 |
| 45.84.160.0/22 | 1k | RIPE NCC | DE | 31st May 2019 |
| 45.84.248.0/22 | 1k | RIPE NCC |  IR | 3rd Jun 2019 |
| 45.84.37.0/24 | 256 | RIPE NCC |  LB | 31st May 2019 |
| 45.84.38.0/23 | 512 | RIPE NCC | DE | 31st May 2019 |
| 45.84.48.0/22 | 1k | RIPE NCC | ES | 31st May 2019 |
| 45.84.8.0/22 | 1k | RIPE NCC | NL | 28th May 2019 |
| 45.84.88.0/24 | 256 | RIPE NCC |  BG | 31st May 2019 |
| 45.85.112.0/22 | 1k | RIPE NCC | DE | 5th Jun 2019 |
| 45.85.189.0/24 | 256 | RIPE NCC | NL | 6th Jun 2019 |
| 45.85.196.0/22 | 1k | RIPE NCC |  IM | 7th Jun 2019 |
| 45.85.32.0/22 | 1k | RIPE NCC | FR | 4th Jun 2019 |
| 45.85.68.0/22 | 1k | RIPE NCC | RU | 4th Jun 2019 |
| 45.85.84.0/22 | 1k | RIPE NCC | AT | 5th Jun 2019 |
| 45.86.120.0/22 | 1k | RIPE NCC |  GB | 12th Jun 2019 |
| 45.86.132.0/22 | 1k | RIPE NCC | CH | 12th Jun 2019 |
| 45.86.172.0/22 | 1k | RIPE NCC |  FI | 13th Jun 2019 |
| 45.86.192.0/22 | 1k | RIPE NCC | AT | 13th Jun 2019 |
| 45.86.236.0/22 | 1k | RIPE NCC |  NO | 13th Jun 2019 |
| 45.86.32.0/24 | 256 | RIPE NCC |  PL | 11th Jun 2019 |
| 45.86.40.0/22 | 1k | RIPE NCC | FR | 11th Jun 2019 |
| 45.87.108.0/22 | 1k | RIPE NCC | NL | 14th Jun 2019 |
| 45.87.24.0/22 | 1k | RIPE NCC |  HR | 13th Jun 2019 |
| 45.87.36.0/22 | 1k | RIPE NCC |  IT | 13th Jun 2019 |
| 45.88.164.0/22 | 1k | RIPE NCC | GB | 19th Jun 2019 |
| 45.88.204.0/22 | 1k | RIPE NCC |  HU | 19th Jun 2019 |
| 45.88.212.0/22 | 1k | RIPE NCC | DE | 19th Jun 2019 |
| 45.88.240.0/22 | 1k | RIPE NCC | AT | 20th Jun 2019 |
| 45.88.32.0/22 | 1k | RIPE NCC |  TR | 18th Jun 2019 |
| 45.88.56.0/24 | 256 | RIPE NCC | IT | 28th Jan 2026 |