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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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Countries with the most unannounced blocks, largest first.
Unannounced blocks in Vietnam
849 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 119.18.128.0/20 | 4.1k | APNIC |  VN | 7th Dec 2007 |
| 120.50.184.0/21 | 2k | APNIC | VN | 27th Mar 2008 |
| 121.50.172.0/22 | 1k | APNIC | VN | 17th Nov 2015 |
| 122.129.0.0/18 | 16.4k | APNIC | VN | 11th Apr 2011 |
| 124.157.0.0/18 | 16.4k | APNIC | VN | 30th Mar 2011 |
| 125.58.0.0/18 | 16.4k | APNIC | VN | 11th Apr 2011 |
| 137.59.28.0/22 | 1k | APNIC | VN | 26th Oct 2015 |
| 137.59.36.0/22 | 1k | APNIC | VN | 26th Oct 2015 |
| 144.79.14.0/23 | 512 | APNIC | VN | 24th Nov 2025 |
| 157.10.86.0/23 | 512 | APNIC | VN | 8th Jan 2024 |
| 157.15.18.0/23 | 512 | APNIC | VN | 23rd Jan 2024 |
| 157.15.84.0/23 | 512 | APNIC | VN | 31st Jan 2024 |
| 157.20.62.0/23 | 512 | APNIC | VN | 19th Feb 2024 |
| 157.66.10.0/23 | 512 | APNIC | VN | 25th Mar 2024 |
| 157.66.12.0/23 | 512 | APNIC | VN | 25th Mar 2024 |
| 157.66.220.0/23 | 512 | APNIC | VN | 6th May 2024 |
| 157.66.98.0/23 | 512 | APNIC | VN | 11th Apr 2024 |
| 160.187.104.0/23 | 512 | APNIC | VN | 23rd Sept 2024 |
| 160.187.242.0/23 | 512 | APNIC | VN | 10th Oct 2024 |
| 160.187.244.0/23 | 512 | APNIC | VN | 10th Oct 2024 |
| 160.187.84.0/23 | 512 | APNIC | VN | 20th Sept 2024 |
| 160.187.88.0/23 | 512 | APNIC | VN | 20th Sept 2024 |
| 160.187.90.0/23 | 512 | APNIC | VN | 20th Sept 2024 |
| 160.19.150.0/23 | 512 | APNIC | VN | 14th May 2024 |
| 160.19.204.0/23 | 512 | APNIC | VN | 15th May 2024 |
| 160.191.102.0/23 | 512 | APNIC | VN | 24th Oct 2024 |
| 160.191.216.0/23 | 512 | APNIC | VN | 11th Nov 2024 |
| 160.191.218.0/23 | 512 | APNIC | VN | 11th Nov 2024 |
| 160.191.222.0/23 | 512 | APNIC | VN | 11th Nov 2024 |
| 160.191.230.0/23 | 512 | APNIC | VN | 12th Nov 2024 |
| 160.191.252.0/23 | 512 | APNIC | VN | 13th Nov 2024 |
| 160.191.254.0/23 | 512 | APNIC | VN | 13th Nov 2024 |
| 160.191.90.0/23 | 512 | APNIC | VN | 24th Oct 2024 |
| 160.191.92.0/23 | 512 | APNIC | VN | 24th Oct 2024 |
| 160.191.94.0/23 | 512 | APNIC | VN | 24th Oct 2024 |
| 160.191.96.0/23 | 512 | APNIC | VN | 24th Oct 2024 |
| 160.191.98.0/23 | 512 | APNIC | VN | 24th Oct 2024 |
| 160.22.118.0/23 | 512 | APNIC | VN | 10th Jun 2024 |
| 160.22.54.0/23 | 512 | APNIC | VN | 4th Jun 2024 |
| 160.236.244.0/23 | 512 | APNIC | VN | 7th Aug 2026 |
| 160.25.150.0/23 | 512 | APNIC | VN | 9th Jul 2024 |
| 160.25.86.0/23 | 512 | APNIC | VN | 3rd Jul 2024 |
| 160.250.0.0/23 | 512 | APNIC | VN | 13th Nov 2024 |
| 160.250.2.0/23 | 512 | APNIC | VN | 13th Nov 2024 |
| 160.250.250.0/23 | 512 | APNIC | VN | 19th Dec 2024 |
| 160.250.30.0/23 | 512 | APNIC | VN | 19th Nov 2024 |
| 160.250.32.0/23 | 512 | APNIC | VN | 19th Nov 2024 |
| 160.250.78.0/23 | 512 | APNIC | VN | 25th Nov 2024 |
| 160.30.170.0/23 | 512 | APNIC | VN | 20th Aug 2024 |
| 160.30.22.0/23 | 512 | APNIC | VN | 25th Jul 2024 |