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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 196.61.68.0/22 | 1k | AFRINIC |  ZA | 19th Oct 2016 |
| 197.104.0.0/13 | 524k | AFRINIC | ZA | 10th Mar 2011 |
| 197.148.192.0/19 | 8.2k | AFRINIC |  CI | 28th Feb 2020 |
| 197.149.132.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.149.140.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.149.152.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.149.164.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.149.172.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.152.0.0/16 | 65.5k | AFRINIC |  TZ | 18th May 2012 |
| 197.155.208.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 197.155.240.0/21 | 2k | AFRINIC | CI | 28th Feb 2020 |
| 197.157.212.0/22 | 1k | AFRINIC |  RW | 3rd Apr 2012 |
| 197.157.236.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.157.248.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.159.224.0/19 | 8.2k | AFRINIC | CI | 28th Feb 2020 |
| 197.168.0.0/13 | 524k | AFRINIC | ZA | 22nd Sept 2010 |
| 197.176.0.0/13 | 524k | AFRINIC |  KE | 13th Oct 2010 |
| 197.189.0.0/17 | 32.8k | AFRINIC |  CD | 17th May 2013 |
| 197.208.0.0/15 | 131k | AFRINIC |  SD | 21st Dec 2012 |
| 197.215.208.0/21 | 2k | AFRINIC | ZA | 7th Mar 2013 |
| 197.215.224.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 197.215.240.0/20 | 4.1k | AFRINIC | TZ | 30th Apr 2013 |
| 197.220.32.0/19 | 8.2k | AFRINIC | CI | 28th Feb 2020 |
| 197.231.184.0/21 | 2k | AFRINIC |  MU | 14th Jan 2013 |
| 197.231.212.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.231.224.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.231.240.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.231.244.0/22 | 1k | AFRINIC |  ZM | 4th Mar 2013 |
| 197.234.224.0/22 | 1k | AFRINIC | TZ | 7th Dec 2012 |
| 197.234.228.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.234.244.0/22 | 1k | AFRINIC | RW | 7th Jan 2013 |
| 197.234.248.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.234.252.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 197.239.192.0/18 | 16.4k | AFRINIC | CI | 28th Feb 2020 |
| 197.242.0.0/19 | 8.2k | AFRINIC |  GA | 18th May 2012 |
| 197.242.208.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 197.242.224.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 197.251.0.0/17 | 32.8k | AFRINIC | SD | 6th Jun 2011 |
| 198.1.16.0/21 | 2k | ARIN |  US | 4th Jan 1993 |
| 198.1.24.0/23 | 512 | ARIN | US | 4th Jan 1993 |
| 198.1.8.0/21 | 2k | ARIN | US | 20th Nov 1992 |
| 198.100.24.0/21 | 2k | ARIN | US | 19th Apr 2013 |
| 198.100.32.0/21 | 2k | ARIN | US | 23rd Mar 1993 |
| 198.100.40.0/23 | 512 | ARIN | US | 23rd Mar 1993 |
| 198.100.64.0/20 | 4.1k | ARIN | US | 26th Mar 1993 |
| 198.100.8.0/21 | 2k | ARIN | US | 19th Mar 1993 |
| 198.100.80.0/21 | 2k | ARIN | US | 26th Mar 1993 |
| 198.100.88.0/22 | 1k | ARIN | US | 26th Mar 1993 |
| 198.100.92.0/23 | 512 | ARIN | US | 26th Mar 1993 |
| 198.101.4.0/23 | 512 | ARIN | US | 24th Mar 1993 |