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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in India
2,802 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.236.204.0/22 | 1k | APNIC |  IN | 28th Aug 2015 |
| 103.236.208.0/22 | 1k | APNIC | IN | 28th Aug 2015 |
| 103.236.236.0/22 | 1k | APNIC | IN | 1st Sept 2015 |
| 103.237.135.0/24 | 256 | APNIC | IN | 16th Jul 2014 |
| 103.239.78.0/24 | 256 | APNIC | IN | 1st Aug 2014 |
| 103.24.36.0/22 | 1k | APNIC | IN | 10th Apr 2013 |
| 103.24.46.0/24 | 256 | APNIC | IN | 10th Apr 2013 |
| 103.240.26.0/23 | 512 | APNIC | IN | 20th Jul 2023 |
| 103.240.58.0/23 | 512 | APNIC | IN | 21st Jul 2023 |
| 103.241.132.0/22 | 1k | APNIC | IN | 2nd Sept 2013 |
| 103.243.236.0/24 | 256 | APNIC | IN | 18th Oct 2013 |
| 103.243.36.0/22 | 1k | APNIC | IN | 4th Oct 2013 |
| 103.244.20.0/23 | 512 | APNIC | IN | 27th Jul 2023 |
| 103.244.22.0/24 | 256 | APNIC | IN | 27th Jul 2023 |
| 103.244.24.0/23 | 512 | APNIC | IN | 27th Jul 2023 |
| 103.244.48.0/24 | 256 | APNIC | IN | 11th Dec 2012 |
| 103.244.94.0/23 | 512 | APNIC | IN | 28th Jul 2023 |
| 103.245.170.0/23 | 512 | APNIC | IN | 1st Aug 2023 |
| 103.246.187.0/24 | 256 | APNIC | IN | 10th Dec 2015 |
| 103.246.196.0/22 | 1k | APNIC | IN | 26th Aug 2011 |
| 103.246.212.0/22 | 1k | APNIC | IN | 29th Aug 2011 |
| 103.247.96.0/22 | 1k | APNIC | IN | 25th Jan 2012 |
| 103.248.52.0/22 | 1k | APNIC | IN | 12th Aug 2016 |
| 103.25.0.0/22 | 1k | APNIC | IN | 24th Apr 2013 |
| 103.25.224.0/22 | 1k | APNIC | IN | 8th May 2013 |
| 103.250.110.0/23 | 512 | APNIC | IN | 8th Aug 2023 |
| 103.250.112.0/22 | 1k | APNIC | IN | 17th Jul 2013 |
| 103.252.140.0/23 | 512 | APNIC | IN | 29th Oct 2013 |
| 103.252.243.0/24 | 256 | APNIC | IN | 14th Aug 2023 |
| 103.252.40.0/22 | 1k | APNIC | IN | 22nd Oct 2013 |
| 103.252.60.0/22 | 1k | APNIC | IN | 23rd Oct 2013 |
| 103.253.128.0/22 | 1k | APNIC | IN | 6th Jan 2016 |
| 103.253.52.0/22 | 1k | APNIC | IN | 11th Nov 2013 |
| 103.253.71.0/24 | 256 | APNIC | IN | 14th Nov 2013 |
| 103.254.200.0/22 | 1k | APNIC | IN | 11th Dec 2013 |
| 103.254.96.0/22 | 1k | APNIC | IN | 3rd Dec 2013 |
| 103.255.168.0/23 | 512 | APNIC | IN | 2nd Jan 2014 |
| 103.255.188.0/22 | 1k | APNIC | IN | 3rd Jan 2014 |
| 103.26.104.0/22 | 1k | APNIC | IN | 19th Jun 2013 |
| 103.26.168.0/24 | 256 | APNIC | IN | 21st Jun 2013 |
| 103.26.234.0/23 | 512 | APNIC | IN | 25th Jun 2013 |
| 103.27.168.0/22 | 1k | APNIC | IN | 4th Jul 2013 |
| 103.29.208.0/22 | 1k | APNIC | IN | 15th Aug 2011 |
| 103.29.232.0/22 | 1k | APNIC | IN | 19th Aug 2011 |
| 103.29.36.0/22 | 1k | APNIC | IN | 12th May 2011 |
| 103.29.80.0/23 | 512 | APNIC | IN | 31st Oct 2022 |
| 103.30.24.0/23 | 512 | APNIC | IN | 1st Nov 2022 |
| 103.35.100.0/22 | 1k | APNIC | IN | 14th Aug 2015 |
| 103.35.192.0/22 | 1k | APNIC | IN | 24th Aug 2015 |
| 103.35.196.0/22 | 1k | APNIC | IN | 24th Aug 2015 |