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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,256 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.54.247.0/24 | 256 | AFRINIC |  ZA | 1st Sept 1993 |
| 198.54.248.0/24 | 256 | AFRINIC | ZA | 1st Sept 1993 |
| 198.54.252.0/24 | 256 | AFRINIC | ZA | 17th Feb 1994 |
| 198.54.254.0/24 | 256 | AFRINIC | ZA | 17th Feb 1994 |
| 198.54.44.0/24 | 256 | AFRINIC | ZA | 3rd Sept 2003 |
| 198.54.45.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.46.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.47.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.48.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.49.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.50.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.51.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.52.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.53.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.54.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.55.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.56.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.57.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.59.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.60.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.61.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 198.54.67.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.69.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.70.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.76.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.77.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.78.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.79.0/24 | 256 | AFRINIC | ZA | 17th Jul 1996 |
| 198.54.85.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.86.0/24 | 256 | AFRINIC | ZA | 9th Jan 2018 |
| 198.54.87.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.98.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.54.99.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 198.55.128.0/18 | 16.4k | ARIN |  US | 15th Oct 1993 |
| 198.55.16.0/21 | 2k | ARIN |  PR | 7th May 1993 |
| 198.55.92.0/23 | 512 | ARIN | US | 10th Feb 1993 |
| 198.56.18.0/23 | 512 | APNIC |  AU | 28th Jul 2025 |
| 198.56.20.0/23 | 512 | APNIC |  JP | 28th Jul 2025 |
| 198.56.32.0/20 | 4.1k | ARIN | US | 4th Feb 1993 |
| 198.56.48.0/22 | 1k | ARIN | US | 4th Feb 1993 |
| 198.56.64.0/18 | 16.4k | ARIN | US | 2nd Feb 1993 |
| 198.57.16.0/21 | 2k | ARIN | US | 5th Feb 1993 |
| 198.57.24.0/23 | 512 | ARIN | US | 5th Feb 1993 |
| 198.57.64.0/20 | 4.1k | ARIN |  CA | 10th Feb 1993 |
| 198.58.12.0/24 | 256 | LACNIC |  BR | 2nd Mar 2015 |
| 198.58.13.0/24 | 256 | ARIN | US | 13th Feb 2020 |
| 198.58.32.0/22 | 1k | ARIN | US | 8th Mar 1993 |
| 198.58.36.0/23 | 512 | ARIN | US | 8th Mar 1993 |
| 198.58.38.0/24 | 256 | ARIN | US | 8th Mar 1993 |
| 198.58.39.0/24 | 256 | ARIN | US | 13th Nov 2013 |