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
2007-10-10 631-566-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2007-10-10 631-566-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2007-10-10 631-623-6XXX 6000–6999Assigned CSC VOICE, LLC 612K W COMMACK NY
2007-10-09 631-392-4XXX 4000–4999Assigned CSC VOICE, LLC 612K DEER PARK NY
2007-10-09 631-415-4XXX 4000–4999Assigned CSC VOICE, LLC 612K CENTRAISLP NY
2007-10-09 631-909-4XXX 4000–4999Assigned CSC VOICE, LLC 612K CTRMORICHS NY
2007-10-08 631-320-4XXX 4000–4999Assigned METROPCS, INC. 5562 SELDEN NY
2007-10-08 631-617-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-10-08 631-617-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-10-08 631-617-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-10-08 631-617-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-10-08 631-617-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2007-09-20 631-763-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 COLDSPGHBR NY
2007-09-20 631-768-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 FARMINGDL NY
2007-09-18 631-319-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SAYVILLE NY
2007-09-18 631-320-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SELDEN NY
2007-09-18 631-392-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 DEER PARK NY
2007-09-18 631-403-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 PTJEFFERSN NY
2007-09-18 631-446-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ISLIP NY
2007-09-18 631-482-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BABYLON NY
2007-09-18 631-485-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 MIDLAND NY
2007-09-18 631-504-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 YAPHANK NY
2007-09-18 631-569-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 PATCHOGUE NY
2007-09-18 631-623-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 W COMMACK NY
2007-09-18 631-676-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 RONKONKOMA NY
2007-09-18 631-686-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ST JAMES NY
2007-09-18 631-703-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 AMITYVILLE NY
2007-09-18 631-740-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 RIVERHEAD NY
2007-09-18 631-784-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
2007-09-18 631-832-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BAYPORT NY
2007-09-18 631-837-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NORTHPORT NY
2007-09-18 631-866-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BELLPORT NY
2007-09-18 631-888-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 LINDENHST NY
2007-09-18 631-941-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 STONYBROOK NY
2007-09-18 631-954-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BAY SHORE NY
2007-09-18 631-973-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 KINGS PARK NY
2007-09-18 631-982-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
2007-09-18 631-993-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 COMMACK NY
2007-09-17 631-228-4XXX 4000–4999Assigned CSC VOICE, LLC 612K SHOREHAM NY
2007-09-17 631-320-0XXX 0000–0999Assigned CSC VOICE, LLC 612K SELDEN NY
2007-09-17 631-320-1XXX 1000–1999Assigned CSC VOICE, LLC 612K SELDEN NY
2007-09-17 631-406-6XXX 6000–6999Assigned CSC VOICE, LLC 612K SMITHTOWN NY
2007-09-17 631-406-7XXX 7000–7999Assigned CSC VOICE, LLC 612K SMITHTOWN NY
2007-09-17 631-615-2XXX 2000–2999Assigned CSC VOICE, LLC 612K RONKONKOMA NY
2007-09-17 631-615-6XXX 6000–6999Assigned CSC VOICE, LLC 612K RONKONKOMA NY
2007-09-17 631-876-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SOUTHOLD NY
2007-09-12 631-482-1XXX 1000–1999Assigned CSC VOICE, LLC 612K BABYLON NY
2007-09-12 631-532-6XXX 6000–6999Assigned CSC VOICE, LLC 612K AMITYVILLE NY
2007-09-12 631-991-3XXX 3000–3999Assigned CSC VOICE, LLC 612K LINDENHST NY
2007-09-11 631-532-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AMITYVILLE 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.