NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

3 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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, last 30 days — NPA 631
CSC WIRELESS, LLC 3
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
2007-03-23 631-888-4XXX 4000–4999Assigned METROPCS, INC. 5562 LINDENHST NY
2007-03-22 631-623-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 W COMMACK NY
2007-03-22 631-638-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 STONYBROOK NY
2007-03-22 631-787-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
2007-03-09 631-833-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 RIVERHEAD NY
2007-03-06 631-656-0XXX 0000–0999Assigned CSC VOICE, LLC 612K SMITHTOWN NY
2007-03-01 631-676-7XXX 7000–7999Assigned CSC VOICE, LLC 612K RONKONKOMA NY
2007-03-01 631-780-8XXX 8000–8999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 SMITHTOWN NY
2007-02-28 631-504-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J YAPHANK NY
2007-02-23 631-316-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-02-23 631-316-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-02-20 631-210-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J ISLIP NY
2007-02-14 631-278-8XXX 8000–8999Assigned METROPCS, INC. 5562 BRENTWOOD NY
2007-02-08 631-312-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 PATCHOGUE NY
2007-02-08 631-320-3XXX 3000–3999Assigned CSC VOICE, LLC 612K SELDEN NY
2007-02-08 631-923-3XXX 3000–3999Assigned CSC VOICE, LLC 612K HUNTINGTON NY
2007-02-08 631-983-8XXX 8000–8999Assigned CSC VOICE, LLC 612K BABYLON NY
2007-01-29 631-912-7XXX 7000–7999Assigned METROPCS, INC. 5562 NORTHPORT NY
2007-01-18 631-867-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LINDENHST NY
2007-01-09 631-504-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 YAPHANK NY
2007-01-05 631-894-6XXX 6000–6999Assigned METROPCS, INC. 5562 BAY SHORE NY
2007-01-05 631-894-7XXX 7000–7999Assigned METROPCS, INC. 5562 BAY SHORE NY
2007-01-05 631-965-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 RIVERHEAD NY
2007-01-04 631-617-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-01-04 631-617-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-01-04 631-617-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-01-02 631-319-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SAYVILLE NY
2006-12-21 631-603-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2006-12-21 631-603-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2006-12-21 631-603-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2006-12-21 631-603-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2006-12-21 631-603-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2006-12-19 631-676-2XXX 2000–2999Assigned CSC VOICE, LLC 612K RONKONKOMA NY
2006-12-18 631-729-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ATLANTIC NY
2006-12-18 631-991-0XXX 0000–0999Assigned METROPCS, INC. 5562 LINDENHST NY
2006-12-15 631-319-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SAYVILLE NY
2006-12-06 631-228-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SHOREHAM NY
2006-12-06 631-504-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 YAPHANK NY
2006-12-06 631-504-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 YAPHANK NY
2006-12-06 631-512-6XXX 6000–6999Assigned METROPCS, INC. 5562 SELDEN NY
2006-12-06 631-512-7XXX 7000–7999Assigned METROPCS, INC. 5562 SELDEN NY
2006-11-30 631-569-8XXX 8000–8999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 PATCHOGUE NY
2006-11-22 631-377-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOUTHAMPTN NY
2006-11-22 631-377-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOUTHAMPTN NY
2006-11-22 631-377-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOUTHAMPTN NY
2006-11-20 631-412-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J LINDENHST NY
2006-11-09 631-560-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2006-11-09 631-560-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2006-11-09 631-560-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2006-11-09 631-560-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.