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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Unannounced blocks registered through APNIC

22,580 blocks match, ordered by prefix.

Allocated but unannounced blocks, 16351 to 16400 of 22580
Prefix	Addresses	Registry	Country	Allocated
2400:c5c0::/32	4.3B × /64	APNIC	TH	1st Mar 2017
2400:c660::/32	4.3B × /64	APNIC	MY	30th Nov 2022
2400:c680::/32	4.3B × /64	APNIC	HK	17th Mar 2014
2400:c6a0::/32	4.3B × /64	APNIC	ID	30th Nov 2022
2400:c6c0::/32	4.3B × /64	APNIC	IN	2nd Mar 2017
2400:c6e0::/32	4.3B × /64	APNIC	BD	30th Nov 2022
2400:c740::/32	4.3B × /64	APNIC	BD	2nd Mar 2017
2400:c820::/32	4.3B × /64	APNIC	IN	5th Dec 2022
2400:c840::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c8a0::/32	4.3B × /64	APNIC	JP	7th Dec 2022
2400:c8c0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c8e0::/32	4.3B × /64	APNIC	IN	7th Dec 2022
2400:c900::/32	4.3B × /64	APNIC	ID	13th May 2011
2400:c920::/32	4.3B × /64	APNIC	IN	7th Dec 2022
2400:c940::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c9a0::/32	4.3B × /64	APNIC	TW	8th Dec 2022
2400:c9c0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:c9e0::/32	4.3B × /64	APNIC	TW	8th Dec 2022
2400:ca20::/32	4.3B × /64	APNIC	TH	9th Dec 2022
2400:ca40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cac0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cae0::/32	4.3B × /64	APNIC	BD	13th Dec 2022
2400:cb40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cbc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cbe0::/32	4.3B × /64	APNIC	BD	14th Dec 2022
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:cce0::/32	4.3B × /64	APNIC	ID	20th Dec 2022
2400:cd20::/32	4.3B × /64	APNIC	BD	20th Dec 2022
2400:cd40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cd80::/32	4.3B × /64	APNIC	ID	26th Mar 2014
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:ce20::/32	4.3B × /64	APNIC	JP	23rd Dec 2022
2400:ce40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:ce60::/32	4.3B × /64	APNIC	IN	23rd Dec 2022
2400:ce80::/32	4.3B × /64	APNIC	BD	27th Mar 2014
2400:cec0::/32	4.3B × /64	APNIC	HK	2nd Mar 2017
2400:cf00::/32	4.3B × /64	APNIC	KR	16th May 2011
2400:cf20::/32	4.3B × /64	APNIC	HK	28th Dec 2022
2400:cf40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cfc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:d040::/32	4.3B × /64	APNIC	LK	3rd 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:d0e0::/32	4.3B × /64	APNIC	NZ	1st Jan 2023
2400:d100::/32	4.3B × /64	APNIC	CN	17th May 2011
2400:d140::/32	4.3B × /64	APNIC	ID	6th Mar 2017