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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

844 blocks match, ordered by prefix.

Allocated but unannounced blocks, 551 to 600 of 844
PrefixAddressesRegistryCountryAllocated
2001:df6:a540::/4865.5k × /64APNICVN29th Jan 2026
2001:df6:aa00::/4865.5k × /64APNICVN18th Nov 2016
2001:df6:aac0::/4865.5k × /64APNICVN2nd Feb 2026
2001:df6:ac80::/4865.5k × /64APNICVN19th May 2021
2001:df6:bf80::/4865.5k × /64APNICVN1st Jun 2021
2001:df6:ce40::/4865.5k × /64APNICVN10th Mar 2026
2001:df6:cf80::/4865.5k × /64APNICVN11th Jun 2021
2001:df6:db00::/4865.5k × /64APNICVN4th Oct 2018
2001:df6:dd00::/4865.5k × /64APNICVN4th Oct 2018
2001:df6:f540::/4865.5k × /64APNICVN21st Apr 2026
2001:df7:1740::/4865.5k × /64APNICVN9th Jun 2026
2001:df7:3f80::/4865.5k × /64APNICVN10th Aug 2021
2001:df7:4080::/4865.5k × /64APNICVN10th Aug 2021
2001:df7:4840::/4865.5k × /64APNICVN29th Jul 2026
2001:df7:4900::/4865.5k × /64APNICVN4th Dec 2018
2001:df7:56c0::/4865.5k × /64APNICVN7th Aug 2026
2001:df7:5740::/4865.5k × /64APNICVN7th Aug 2026
2001:df7:65c0::/4865.5k × /64APNICVN22nd Aug 2026
2001:df7:7040::/4865.5k × /64APNICVN2nd Sept 2026
2001:df7:7300::/4865.5k × /64APNICVN24th Dec 2018
2001:df7:79c0::/4865.5k × /64APNICVN9th Sept 2026
2001:df7:7a40::/4865.5k × /64APNICVN9th Sept 2026
2001:df7:7ac0::/4865.5k × /64APNICVN9th Sept 2026
2001:df7:9f40::/4865.5k × /64APNICVN1st Oct 2026
2001:df7:b40::/4865.5k × /64APNICVN19th May 2026
2001:df7:bb40::/4865.5k × /64APNICVN20th Oct 2026
2001:df7:c1c0::/4865.5k × /64APNICVN26th Oct 2026
2001:df7:ca00::/4865.5k × /64APNICVN12th Jan 2017
2001:df7:cc00::/4865.5k × /64APNICVN4th Dec 2015
2001:df7:d580::/4865.5k × /64APNICVN19th Oct 2021
2001:df7:dc0::/4865.5k × /64APNICVN21st May 2026
202.130.36.0/23512APNICVN2nd Apr 2009
202.172.4.0/23512APNICVN25th Oct 2006
202.181.143.0/24256APNICVN13th Dec 2000
202.92.213.0/24256APNICVN13th Dec 2004
202.94.88.0/23512APNICVN29th Dec 2010
203.119.58.0/23512APNICVN3rd Nov 2008
203.160.96.0/212kAPNICVN30th Sept 2003
203.163.128.0/1816.4kAPNICVN6th Apr 2011
203.176.160.0/212kAPNICVN1st Dec 2006
203.195.0.0/1816.4kAPNICVN11th Apr 2011
203.79.28.0/24256APNICVN13th Aug 2009
203.89.140.0/221kAPNICVN15th Apr 2009
203.99.248.0/221kAPNICVN16th Mar 2007
210.79.176.0/23512APNICVN30th Nov 2023
218.100.10.0/24256APNICVN17th Sept 2003
218.100.14.0/24256APNICVN25th Nov 2003
2400:16a0::/324.3B × /64APNICVN19th Oct 2021
2400:1aa0::/324.3B × /64APNICVN1st Nov 2021
2400:1da0::/324.3B × /64APNICVN8th Nov 2021