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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.

Unannounced blocks

85,346 blocks match, ordered by prefix.

Allocated but unannounced blocks, 53201 to 53250 of 85346
Prefix	Addresses	Registry	Country	Allocated
2400:5400::/32	4.3B × /64	APNIC	CN	26th Jun 2009
2400:5440::/32	4.3B × /64	APNIC	HK	30th Nov 2016
2400:54e0::/32	4.3B × /64	APNIC	IN	27th Jan 2022
2400:5540::/32	4.3B × /64	APNIC	NZ	1st Dec 2016
2400:5560::/32	4.3B × /64	APNIC	AU	28th Jan 2022
2400:5580::/32	4.3B × /64	APNIC	CN	7th Nov 2013
2400:55c0::/32	4.3B × /64	APNIC	CN	2nd Dec 2016
2400:55e0::/32	4.3B × /64	APNIC	CN	30th Jan 2022
2400:5600::/32	4.3B × /64	APNIC	CN	15th Mar 2010
2400:5640::/32	4.3B × /64	APNIC	CN	2nd Dec 2016
2400:56c0::/32	4.3B × /64	APNIC	CN	2nd Dec 2016
2400:56e0::/32	4.3B × /64	APNIC	ID	2nd Feb 2022
2400:5700::/32	4.3B × /64	APNIC	IN	15th Apr 2011
2400:5720::/32	4.3B × /64	APNIC	BD	3rd Feb 2022
2400:5780::/32	4.3B × /64	APNIC	TH	7th Nov 2013
2400:57a0::/32	4.3B × /64	APNIC	MM	3rd Feb 2022
2400:57c0::/32	4.3B × /64	APNIC	CN	2nd Dec 2016
2400:5820::/32	4.3B × /64	APNIC	BD	3rd Feb 2022
2400:5840::/32	4.3B × /64	APNIC	CN	2nd Dec 2016
2400:58c0::/32	4.3B × /64	APNIC	IN	2nd Dec 2016
2400:58e0::/32	4.3B × /64	APNIC	BD	6th Feb 2022
2400:5920::/32	4.3B × /64	APNIC	KR	8th Feb 2022
2400:59a0::/32	4.3B × /64	APNIC	IN	11th Feb 2022
2400:59c0::/32	4.3B × /64	APNIC	TH	5th Dec 2016
2400:5a40::/32	4.3B × /64	APNIC	CN	5th Dec 2016
2400:5ac0::/32	4.3B × /64	APNIC	CN	5th Dec 2016
2400:5ae0::/32	4.3B × /64	APNIC	NZ	14th Feb 2022
2400:5b20::/32	4.3B × /64	APNIC	HK	16th Feb 2022
2400:5b40::/32	4.3B × /64	APNIC	CN	5th Dec 2016
2400:5b80::/32	4.3B × /64	APNIC	AU	11th Nov 2013
2400:5ba0::/32	4.3B × /64	APNIC	VN	18th Feb 2022
2400:5bc0::/32	4.3B × /64	APNIC	CN	5th Dec 2016
2400:5c20::/32	4.3B × /64	APNIC	IN	18th Feb 2022
2400:5c40::/32	4.3B × /64	APNIC	CN	5th Dec 2016
2400:5c80::/32	4.3B × /64	APNIC	CN	13th Nov 2013
2400:5ca0::/32	4.3B × /64	APNIC	IN	22nd Feb 2022
2400:5cc0::/32	4.3B × /64	APNIC	CN	5th Dec 2016
2400:5d20::/32	4.3B × /64	APNIC	IN	23rd Feb 2022
2400:5da0::/32	4.3B × /64	APNIC	BD	23rd Feb 2022
2400:5de0::/32	4.3B × /64	APNIC	IN	24th Feb 2022
2400:5e20::/32	4.3B × /64	APNIC	CN	28th Feb 2022
2400:5e60::/32	4.3B × /64	APNIC	AU	1st Mar 2022
2400:5e80::/32	4.3B × /64	APNIC	CN	18th Nov 2013
2400:5ea0::/32	4.3B × /64	APNIC	TW	1st Mar 2022
2400:5ee0::/32	4.3B × /64	APNIC	CN	2nd Mar 2022
2400:5f00::/32	4.3B × /64	APNIC	PF	18th Apr 2011
2400:5f40::/32	4.3B × /64	APNIC	MM	6th Dec 2016
2400:5f80::/32	4.3B × /64	APNIC	HK	19th Nov 2013
2400:5fc0::/32	4.3B × /64	APNIC	CN	6th Dec 2016
2400:5fe0::/32	4.3B × /64	APNIC	IN	4th Mar 2022