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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks in India
2,757 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 137.59.156.0/22 | 1k | APNIC |  IN | 4th Feb 2016 |
| 137.59.164.0/22 | 1k | APNIC | IN | 5th Feb 2016 |
| 137.59.176.0/22 | 1k | APNIC | IN | 5th Feb 2016 |
| 137.59.244.0/22 | 1k | APNIC | IN | 10th Feb 2016 |
| 138.252.230.0/23 | 512 | APNIC | IN | 18th Nov 2025 |
| 138.252.36.0/23 | 512 | APNIC | IN | 11th Oct 2025 |
| 138.252.42.0/24 | 256 | APNIC | IN | 14th Oct 2025 |
| 144.16.113.0/24 | 256 | APNIC | IN | 6th Nov 1990 |
| 144.16.114.0/23 | 512 | APNIC | IN | 6th Nov 1990 |
| 144.16.116.0/22 | 1k | APNIC | IN | 6th Nov 1990 |
| 144.16.120.0/21 | 2k | APNIC | IN | 6th Nov 1990 |
| 144.16.64.0/19 | 8.2k | APNIC | IN | 6th Nov 1990 |
| 144.16.96.0/20 | 4.1k | APNIC | IN | 6th Nov 1990 |
| 144.36.104.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.128.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.36.144.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.36.148.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.36.176.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.178.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.236.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.72.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.79.126.0/23 | 512 | APNIC | IN | 15th Dec 2025 |
| 144.79.206.0/23 | 512 | APNIC | IN | 24th Dec 2025 |
| 144.79.208.0/23 | 512 | APNIC | IN | 24th Dec 2025 |
| 147.160.64.0/18 | 16.4k | APNIC | IN | 29th Apr 1991 |
| 150.107.88.0/22 | 1k | APNIC | IN | 19th Jun 2014 |
| 150.129.140.0/22 | 1k | APNIC | IN | 27th Jun 2014 |
| 150.129.196.0/22 | 1k | APNIC | IN | 30th Jun 2014 |
| 150.129.212.0/22 | 1k | APNIC | IN | 1st Jul 2014 |
| 151.158.104.0/23 | 512 | APNIC | IN | 29th Jan 2026 |
| 151.158.140.0/23 | 512 | APNIC | IN | 4th Feb 2026 |
| 151.158.148.0/23 | 512 | APNIC | IN | 6th Feb 2026 |
| 151.158.156.0/23 | 512 | APNIC | IN | 9th Feb 2026 |
| 151.158.192.0/22 | 1k | APNIC | IN | 17th Feb 2026 |
| 151.158.228.0/23 | 512 | APNIC | IN | 24th Feb 2026 |
| 157.10.204.0/24 | 256 | APNIC | IN | 15th Jan 2024 |
| 157.10.40.0/24 | 256 | APNIC | IN | 2nd Jan 2024 |
| 157.10.60.0/23 | 512 | APNIC | IN | 3rd Jan 2024 |
| 157.15.130.0/23 | 512 | APNIC | IN | 5th Feb 2024 |
| 157.15.132.0/23 | 512 | APNIC | IN | 5th Feb 2024 |
| 157.15.24.0/23 | 512 | APNIC | IN | 23rd Jan 2024 |
| 157.20.153.0/24 | 256 | APNIC | IN | 5th Mar 2024 |
| 157.20.216.0/24 | 256 | APNIC | IN | 15th Mar 2024 |
| 157.66.110.0/23 | 512 | APNIC | IN | 16th Apr 2024 |
| 157.66.148.0/23 | 512 | APNIC | IN | 19th Apr 2024 |
| 160.187.208.0/23 | 512 | APNIC | IN | 8th Oct 2024 |
| 160.187.31.0/24 | 256 | APNIC | IN | 13th Sept 2024 |
| 160.187.46.0/23 | 512 | APNIC | IN | 13th Sept 2024 |
| 160.19.220.0/22 | 1k | APNIC | IN | 3rd Mar 2016 |
| 160.19.34.0/24 | 256 | APNIC | IN | 8th May 2024 |