NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 973
LEVEL 3 COMMUNICATIONS, LLC - NJ 179
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-05-07 973-447-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NUTLEY NJ
2019-05-07 973-447-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NUTLEY NJ
2018-01-29 973-828-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 MORRISTOWN NJ
2017-11-24 973-737-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 VERNON NJ
2017-11-24 973-749-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 UPGRENWDLK NJ
2016-08-02 973-422-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LIVINGSTON NJ
2015-09-23 973-840-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 CALDWELL NJ
2015-08-25 973-828-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 MORRISTOWN NJ
2015-08-06 973-755-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NEWARK NJ
2015-06-04 973-755-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NEWARK NJ
2015-04-09 973-559-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 VERONA NJ
2015-03-04 973-917-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 BOONTON NJ
2015-02-24 973-786-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 ANDOVER NJ
2014-09-29 973-755-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NEWARK NJ
2014-09-22 973-577-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LIVINGSTON NJ
2014-07-25 973-755-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NEWARK NJ
2014-05-07 973-512-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LAKEMOHAWK NJ
2014-03-31 973-604-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 BELLEVILLE NJ
2014-03-31 973-721-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 SUSSEX NJ
2013-07-09 973-434-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 WHIPPANY NJ
2013-06-26 973-500-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 ANDOVER NJ
2013-03-07 973-949-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 HAWTHORNE NJ
2012-11-07 973-587-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 MT VIEW NJ
2012-05-23 973-435-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LITTLE FLS NJ
2012-05-16 973-814-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NEWFOUNDLD NJ
2012-03-01 973-816-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 PASSAIC NJ
2012-02-15 973-453-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 ROCKAWAY NJ
2012-02-09 973-261-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 MADISON NJ
2012-02-09 973-542-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NUTLEY NJ
2011-12-29 973-577-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LIVINGSTON NJ
2011-12-29 973-846-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 W MILFORD NJ
2011-10-14 973-435-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LITTLE FLS NJ
2011-10-06 973-810-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 HOPATCONG NJ
2011-03-08 973-996-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 SO ORANGE NJ
2010-11-08 973-321-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 PATERSON NJ
2010-10-26 973-435-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LITTLE FLS NJ
2010-10-26 973-577-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 LIVINGSTON NJ
2010-01-21 973-665-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 CHATHAM NJ
2008-09-23 973-250-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 BRANCHVL NJ
2008-08-01 973-771-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 BLOOMFIELD NJ
2008-05-07 973-587-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 MT VIEW NJ
2008-05-05 973-804-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NETCONG NJ
2008-05-05 973-862-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 NEWTON NJ
2008-04-11 973-510-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 PASSAIC NJ
2008-02-14 973-500-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 ANDOVER NJ
2008-02-05 973-434-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 WHIPPANY NJ
2008-02-04 973-510-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 PASSAIC NJ
2008-01-31 973-309-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 CHATHAM NJ
2008-01-31 973-309-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 CHATHAM NJ
2008-01-31 973-321-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 PATERSON NJ

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.