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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

6,735 blocks match, ordered by prefix.

Allocated but unannounced blocks, 4201 to 4250 of 6735
Prefix	Addresses	Registry	Country	Allocated
2400:c840::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c8c0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c940::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c9c0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:ca40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cac0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cb40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cbc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cc40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cc80::/32	4.3B × /64	APNIC	CN	26th Mar 2014
2400:ccc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cd40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cda0::/32	4.3B × /64	APNIC	CN	21st Dec 2022
2400:cdc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:ce00::/32	4.3B × /64	APNIC	CN	22nd Mar 2010
2400:ce40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cf40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cfc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:d0a0::/32	4.3B × /64	APNIC	CN	29th Dec 2022
2400:d0c0::/32	4.3B × /64	APNIC	CN	3rd Mar 2017
2400:d100::/32	4.3B × /64	APNIC	CN	17th May 2011
2400:d160::/32	4.3B × /64	APNIC	CN	4th Jan 2023
2400:d1c0::/32	4.3B × /64	APNIC	CN	7th Mar 2017
2400:d200::/32	4.3B × /64	APNIC	CN	22nd Mar 2010
2400:d300::/32	4.3B × /64	APNIC	CN	18th May 2011
2400:d440::/32	4.3B × /64	APNIC	CN	8th Mar 2017
2400:d600::/32	4.3B × /64	APNIC	CN	22nd Mar 2010
2400:d6a0::/32	4.3B × /64	APNIC	CN	16th Jan 2023
2400:d6c0::/32	4.3B × /64	APNIC	CN	10th Mar 2017
2400:d720::/32	4.3B × /64	APNIC	CN	17th Jan 2023
2400:d780::/32	4.3B × /64	APNIC	CN	4th Apr 2014
2400:d7a0::/32	4.3B × /64	APNIC	CN	18th Jan 2023
2400:da60::/32	4.3B × /64	APNIC	CN	31st Jan 2023
2400:dd40::/32	4.3B × /64	APNIC	CN	16th Mar 2017
2400:dda0::/32	4.3B × /64	APNIC	CN	12th Feb 2023
2400:de00::/32	4.3B × /64	APNIC	CN	23rd Mar 2010
2400:de80::/32	4.3B × /64	APNIC	CN	10th Apr 2014
2400:dee0::/32	4.3B × /64	APNIC	CN	15th Feb 2023
2400:e0c0::/32	4.3B × /64	APNIC	CN	21st Mar 2017
2400:e7e0::/32	4.3B × /64	APNIC	CN	8th Mar 2023
2400:e880::/32	4.3B × /64	APNIC	CN	23rd Apr 2014
2400:ebc0::/32	4.3B × /64	APNIC	CN	30th Mar 2017
2400:ed60::/32	4.3B × /64	APNIC	CN	20th Mar 2023
2400:eda0::/32	4.3B × /64	APNIC	CN	20th Mar 2023
2400:edc0::/32	4.3B × /64	APNIC	CN	30th Mar 2017
2400:eec0::/32	4.3B × /64	APNIC	CN	31st Mar 2017
2400:ef40::/32	4.3B × /64	APNIC	CN	31st Mar 2017
2400:f480::/32	4.3B × /64	APNIC	CN	4th May 2014
2400:f5c0::/32	4.3B × /64	APNIC	CN	11th Apr 2017
2400:f7c0::/32	4.3B × /64	APNIC	CN	14th Apr 2017