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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

552 blocks match, ordered by prefix.

Allocated but unannounced blocks, 401 to 450 of 552
Prefix	Addresses	Registry	Country	Allocated
2401:5720::/32	4.3B × /64	APNIC	SG	5th Dec 2023
2401:5a20::/32	4.3B × /64	APNIC	SG	12th Dec 2023
2401:7401::/32	4.3B × /64	APNIC	SG	7th Jun 2012
2401:7de0::/32	4.3B × /64	APNIC	SG	7th Feb 2024
2401:ac40::/32	4.3B × /64	APNIC	SG	23rd Aug 2017
2401:af40::/32	4.3B × /64	APNIC	SG	24th Aug 2017
2401:b3c0::/32	4.3B × /64	APNIC	SG	30th Aug 2017
2401:bae0::/32	4.3B × /64	APNIC	SG	14th Aug 2024
2401:c901::/32	4.3B × /64	APNIC	SG	20th Nov 2013
2401:d5c0::/32	4.3B × /64	APNIC	SG	30th Sept 2017
2401:db00::/32	4.3B × /64	APNIC	SG	31st Aug 2011
2401:db80::/32	4.3B × /64	APNIC	SG	16th Dec 2014
2401:eb60::/32	4.3B × /64	APNIC	SG	29th Jan 2025
2401:ed60::/32	4.3B × /64	APNIC	SG	10th Feb 2025
2401:ef00::/32	4.3B × /64	APNIC	SG	8th Sept 2011
2401:f900::/32	4.3B × /64	APNIC	SG	19th Sept 2011
2401:f960::/32	4.3B × /64	APNIC	SG	25th Mar 2025
2401:faa0::/32	4.3B × /64	APNIC	SG	4th Apr 2025
2402:4360::/32	4.3B × /64	APNIC	SG	29th Dec 2025
2402:44a0::/32	4.3B × /64	APNIC	SG	31st Dec 2025
2402:4a20::/32	4.3B × /64	APNIC	SG	22nd Jan 2026
2402:500::/32	4.3B × /64	APNIC	SG	20th Sept 2011
2402:5900::/32	4.3B × /64	APNIC	SG	24th Oct 2011
2402:60e0::/32	4.3B × /64	APNIC	SG	1st Jun 2026
2402:6e0::/32	4.3B × /64	APNIC	SG	2nd May 2025
2402:7880::/32	4.3B × /64	APNIC	SG	17th Jun 2015
2402:8f00::/32	4.3B × /64	APNIC	SG	17th Nov 2011
2402:980::/32	4.3B × /64	APNIC	SG	9th Feb 2015
2402:a900::/32	4.3B × /64	APNIC	SG	8th Dec 2011
2402:d80::/32	4.3B × /64	APNIC	SG	13th Feb 2015
2402:e600::/32	4.3B × /64	APNIC	SG	18th Jun 2010
2402:f0c0::/32	4.3B × /64	APNIC	SG	24th May 2018
2403:100::/32	4.3B × /64	APNIC	SG	31st Jan 2012
2403:19c0::/32	4.3B × /64	APNIC	SG	26th Jun 2018
2403:1a80::/32	4.3B × /64	APNIC	SG	20th Oct 2015
2403:2340::/32	4.3B × /64	APNIC	SG	4th Jul 2018
2403:3100::/32	4.3B × /64	APNIC	SG	28th Feb 2012
2403:6b00::/32	4.3B × /64	APNIC	SG	23rd Mar 2012
2403:740::/32	4.3B × /64	APNIC	SG	7th Jun 2018
2403:7c80::/32	4.3B × /64	APNIC	SG	12th Nov 2015
2403:940::/32	4.3B × /64	APNIC	SG	7th Jun 2018
2403:a900::/32	4.3B × /64	APNIC	SG	23rd Apr 2012
2403:b101::/32	4.3B × /64	APNIC	SG	31st Jan 2022
2403:c500::/32	4.3B × /64	APNIC	SG	4th May 2012
2403:cc00::/32	4.3B × /64	APNIC	SG	22nd Jan 2010
2403:dc40::/32	4.3B × /64	APNIC	SG	30th Oct 2018
2403:de40::/32	4.3B × /64	APNIC	SG	31st Oct 2018
2403:df00::/32	4.3B × /64	APNIC	SG	11th May 2012
2403:ec40::/32	4.3B × /64	APNIC	SG	12th Nov 2018
2404:39c0::/32	4.3B × /64	APNIC	SG	8th Jan 2019