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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.

Unannounced blocks in Vietnam

822 blocks match, ordered by prefix.

Allocated but unannounced blocks, 101 to 150 of 822
PrefixAddressesRegistryCountryAllocated
103.28.172.0/221kAPNICVN6th Jan 2012
103.39.96.0/221kAPNICVN19th Sept 2014
103.45.236.0/221kAPNICVN15th Dec 2014
103.52.112.0/23512APNICVN9th Dec 2022
103.52.92.0/221kAPNICVN6th Mar 2015
103.53.252.0/221kAPNICVN30th Mar 2015
103.54.252.0/221kAPNICVN14th Apr 2015
103.57.104.0/221kAPNICVN15th May 2015
103.62.8.0/221kAPNICVN2nd Jul 2015
103.67.74.0/23512APNICVN21st Oct 2023
103.68.72.0/221kAPNICVN30th Jun 2016
103.69.82.0/23512APNICVN6th Sept 2023
103.69.98.0/23512APNICVN6th Sept 2023
103.70.168.0/23512APNICVN29th Jul 2022
103.70.28.0/221kAPNICVN25th Jul 2016
103.71.184.0/221kAPNICVN12th Aug 2016
103.72.66.0/23512APNICVN8th Sept 2023
103.75.176.0/221kAPNICVN21st Sept 2016
103.75.74.0/23512APNICVN8th Sept 2023
103.78.4.0/23512APNICVN12th Sept 2023
103.78.88.0/221kAPNICVN1st Nov 2016
103.79.144.0/221kAPNICVN18th Nov 2016
103.8.13.0/24256APNICVN12th Apr 2012
103.81.80.0/221kAPNICVN8th Dec 2016
103.84.102.0/23512APNICVN10th Feb 2023
103.9.80.0/221kAPNICVN10th May 2012
103.92.32.0/221kAPNICVN5th May 2017
110.172.26.0/23512APNICVN11th Aug 2025
110.44.184.0/212kAPNICVN17th Mar 2009
112.72.64.0/1816.4kAPNICVN24th Dec 2008
116.68.128.0/212kAPNICVN10th May 2007
120.50.184.0/212kAPNICVN27th Mar 2008
121.50.172.0/221kAPNICVN17th Nov 2015
122.129.0.0/1816.4kAPNICVN11th Apr 2011
124.157.0.0/1816.4kAPNICVN30th Mar 2011
125.58.0.0/1816.4kAPNICVN11th Apr 2011
137.59.28.0/221kAPNICVN26th Oct 2015
137.59.36.0/221kAPNICVN26th Oct 2015
138.252.132.0/23512APNICVN3rd Nov 2025
138.252.142.0/23512APNICVN5th Nov 2025
138.252.218.0/23512APNICVN17th Nov 2025
144.79.14.0/23512APNICVN24th Nov 2025
151.158.102.0/23512APNICVN29th Jan 2026
151.158.94.0/23512APNICVN28th Jan 2026
157.10.86.0/23512APNICVN8th Jan 2024
157.15.18.0/23512APNICVN23rd Jan 2024
157.15.84.0/23512APNICVN31st Jan 2024
157.20.62.0/23512APNICVN19th Feb 2024
157.66.10.0/23512APNICVN25th Mar 2024
160.187.104.0/23512APNICVN23rd Sept 2024