SUBNET.IM

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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 Vietnam

825 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1 to 50 of 825
PrefixAddressesRegistryCountryAllocated
103.102.20.0/221kAPNICVN10th Oct 2017
103.109.28.0/221kAPNICVN8th Feb 2018
103.111.240.0/221kAPNICVN21st Mar 2018
103.112.124.0/221kAPNICVN29th Mar 2018
103.112.132.0/221kAPNICVN2nd Apr 2018
103.113.88.0/221kAPNICVN11th Apr 2018
103.116.54.0/23512APNICVN16th Mar 2023
103.117.196.0/23512APNICVN21st Mar 2023
103.118.30.0/23512APNICVN21st Mar 2023
103.120.156.0/221kAPNICVN7th Aug 2018
103.120.78.0/23512APNICVN10th Aug 2022
103.127.200.0/221kAPNICVN24th Dec 2018
103.130.220.0/221kAPNICVN11th Oct 2018
103.130.52.0/221kAPNICVN4th Oct 2018
103.136.228.0/23512APNICVN14th Mar 2019
103.137.4.0/23512APNICVN18th Mar 2019
103.138.110.0/23512APNICVN19th Apr 2019
103.138.90.0/23512APNICVN17th Apr 2019
103.14.146.0/23512APNICVN17th Nov 2022
103.140.100.0/23512APNICVN25th Jun 2019
103.140.40.0/23512APNICVN18th Jun 2019
103.144.154.0/23512APNICVN28th Oct 2019
103.145.250.0/23512APNICVN2nd Dec 2019
103.147.188.0/23512APNICVN17th Jan 2020
103.149.134.0/23512APNICVN19th Aug 2022
103.149.254.0/23512APNICVN30th Mar 2020
103.150.0.0/23512APNICVN30th Mar 2020
103.152.160.0/23512APNICVN25th Jun 2020
103.152.46.0/23512APNICVN15th Jun 2020
103.154.166.0/23512APNICVN14th Aug 2020
103.155.164.0/23512APNICVN11th Sept 2020
103.155.80.0/23512APNICVN3rd Sept 2020
103.155.82.0/23512APNICVN3rd Sept 2020
103.157.18.0/23512APNICVN8th Oct 2020
103.159.56.0/23512APNICVN25th Nov 2020
103.16.212.0/23512APNICVN3rd Oct 2022
103.160.78.0/23512APNICVN15th Dec 2020
103.160.88.0/23512APNICVN15th Dec 2020
103.160.90.0/23512APNICVN15th Dec 2020
103.161.174.0/23512APNICVN13th Jan 2021
103.161.176.0/23512APNICVN13th Jan 2021
103.161.36.0/23512APNICVN20th Apr 2023
103.162.28.0/23512APNICVN26th Jan 2021
103.162.98.0/23512APNICVN3rd Feb 2021
103.163.122.0/23512APNICVN26th Feb 2021
103.163.212.0/23512APNICVN4th Mar 2021
103.164.152.0/23512APNICVN19th Mar 2021
103.164.154.0/23512APNICVN19th Mar 2021
103.164.164.0/23512APNICVN22nd Mar 2021
103.166.176.0/23512APNICVN28th Apr 2021