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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with the most unannounced blocks, largest first.

Unannounced blocks

85,458 blocks match, ordered by prefix.

Allocated but unannounced blocks, 41851 to 41900 of 85458
Prefix	Addresses	Registry	Country	Allocated
2001:df6:37c0::/48	65.5k × /64	APNIC	ID	16th Oct 2025
2001:df6:3800::/48	65.5k × /64	APNIC	NZ	26th May 2014
2001:df6:380::/48	65.5k × /64	APNIC	NP	15th Feb 2021
2001:df6:3840::/48	65.5k × /64	APNIC	BD	16th Oct 2025
2001:df6:38c0::/48	65.5k × /64	APNIC	BD	16th Oct 2025
2001:df6:3900::/48	65.5k × /64	APNIC	ID	16th Aug 2018
2001:df6:3940::/48	65.5k × /64	APNIC	BD	17th Oct 2025
2001:df6:3980::/48	65.5k × /64	APNIC	AU	11th Mar 2021
2001:df6:3a00::/48	65.5k × /64	APNIC	AU	4th Nov 2016
2001:df6:3a40::/48	65.5k × /64	APNIC	ID	17th Oct 2025
2001:df6:3a80::/48	65.5k × /64	APNIC	IN	11th Mar 2021
2001:df6:3ac0::/48	65.5k × /64	APNIC	PH	20th Oct 2025
2001:df6:3b00::/48	65.5k × /64	APNIC	AU	17th Aug 2018
2001:df6:3b40::/48	65.5k × /64	APNIC	ID	20th Oct 2025
2001:df6:3b80::/48	65.5k × /64	APNIC	PK	11th Mar 2021
2001:df6:3c0::/48	65.5k × /64	APNIC	BD	20th Aug 2025
2001:df6:3c80::/48	65.5k × /64	APNIC	PK	11th Mar 2021
2001:df6:3cc0::/48	65.5k × /64	APNIC	ID	22nd Oct 2025
2001:df6:3d40::/48	65.5k × /64	APNIC	ID	22nd Oct 2025
2001:df6:3e00::/48	65.5k × /64	APNIC	ID	4th Nov 2016
2001:df6:3f00::/48	65.5k × /64	APNIC	ID	21st Aug 2018
2001:df6:3f40::/48	65.5k × /64	APNIC	ID	23rd Oct 2025
2001:df6:3f80::/48	65.5k × /64	APNIC	TW	12th Mar 2021
2001:df6:3fc0::/48	65.5k × /64	APNIC	IN	23rd Oct 2025
2001:df6:4000::/48	65.5k × /64	APNIC	AU	2nd May 2013
2001:df6:4001::/48	65.5k × /64	APNIC	AU	7th Apr 2014
2001:df6:400::/48	65.5k × /64	APNIC	HK	8th Sept 2015
2001:df6:4040::/48	65.5k × /64	APNIC	ID	24th Oct 2025
2001:df6:4080::/48	65.5k × /64	APNIC	MY	15th Mar 2021
2001:df6:4100::/48	65.5k × /64	APNIC	AU	23rd Aug 2018
2001:df6:4140::/48	65.5k × /64	APNIC	IN	28th Oct 2025
2001:df6:4200::/48	65.5k × /64	APNIC	ID	4th Nov 2016
2001:df6:4240::/48	65.5k × /64	APNIC	IN	28th Oct 2025
2001:df6:42c0::/48	65.5k × /64	APNIC	ID	29th Oct 2025
2001:df6:4300::/48	65.5k × /64	APNIC	BD	24th Aug 2018
2001:df6:4340::/48	65.5k × /64	APNIC	BD	29th Oct 2025
2001:df6:4380::/48	65.5k × /64	APNIC	BD	17th Mar 2021
2001:df6:43c0::/48	65.5k × /64	APNIC	ID	29th Oct 2025
2001:df6:440::/48	65.5k × /64	APNIC	ID	21st Aug 2025
2001:df6:4480::/48	65.5k × /64	APNIC	BD	17th Mar 2021
2001:df6:44c0::/48	65.5k × /64	APNIC	ID	3rd Nov 2025
2001:df6:4500::/48	65.5k × /64	APNIC	ID	24th Aug 2018
2001:df6:4580::/48	65.5k × /64	APNIC	BD	17th Mar 2021
2001:df6:45c0::/48	65.5k × /64	APNIC	ID	4th Nov 2025
2001:df6:4600::/48	65.5k × /64	APNIC	AU	7th Nov 2016
2001:df6:4640::/48	65.5k × /64	APNIC	ID	4th Nov 2025
2001:df6:4680::/48	65.5k × /64	APNIC	VN	18th Mar 2021
2001:df6:46c0::/48	65.5k × /64	APNIC	VN	5th Nov 2025
2001:df6:4700::/48	65.5k × /64	APNIC	ID	24th Aug 2018
2001:df6:4740::/48	65.5k × /64	APNIC	SG	5th Nov 2025