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
2005-10-06 631-638-0XXX 0000–0999Assigned VERIZON NEW YORK, INC. 9104 STONYBROOK NY
2005-10-06 631-638-1XXX 1000–1999Assigned VERIZON NEW YORK, INC. 9104 STONYBROOK NY
2005-10-06 631-638-2XXX 2000–2999Assigned VERIZON NEW YORK, INC. 9104 STONYBROOK NY
2005-10-06 631-638-3XXX 3000–3999Assigned VERIZON NEW YORK, INC. 9104 STONYBROOK NY
2005-10-06 631-638-4XXX 4000–4999Assigned VERIZON NEW YORK, INC. 9104 STONYBROOK NY
2005-10-06 631-972-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BRENTWOOD NY
2005-10-04 631-876-5XXX 5000–5999Assigned CSC VOICE, LLC 612K SOUTHOLD NY
2005-09-27 631-714-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PATCHOGUE NY
2005-09-26 631-918-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 DEER PARK NY
2005-09-26 631-918-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 DEER PARK NY
2005-09-23 631-302-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C E FIRE IS NY
2005-09-23 631-570-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C FIREISLAND NY
2005-09-22 631-820-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J RONKONKOMA NY
2005-09-21 631-356-7XXX 7000–7999Assigned METROPCS, INC. 5562 BRENTWOOD NY
2005-09-21 631-380-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 STONYBROOK NY
2005-09-21 631-380-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 STONYBROOK NY
2005-09-21 631-380-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 STONYBROOK NY
2005-09-21 631-822-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
2005-09-21 631-822-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
2005-09-21 631-822-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
2005-09-21 631-850-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 W COMMACK NY
2005-09-21 631-850-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C W COMMACK NY
2005-09-21 631-850-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C W COMMACK NY
2005-09-21 631-867-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 LINDENHST NY
2005-09-21 631-938-0XXX 0000–0999Assigned ONVOY, LLC- NY 384C PTJEFFERSN NY
2005-09-21 631-938-8XXX 8000–8999Assigned ONVOY, LLC- NY 384C PTJEFFERSN NY
2005-09-21 631-938-9XXX 9000–9999Assigned ONVOY, LLC- NY 384C PTJEFFERSN NY
2005-09-21 631-982-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
2005-09-21 631-982-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
2005-09-21 631-982-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
2005-09-21 631-995-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C YAPHANK NY
2005-09-21 631-995-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C YAPHANK NY
2005-09-21 631-995-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 YAPHANK NY
2005-09-21 631-995-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 YAPHANK NY
2005-09-20 631-256-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SAYVILLE NY
2005-09-20 631-355-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BRENTWOOD NY
2005-09-20 631-520-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 AMITYVILLE NY
2005-09-20 631-677-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SAYVILLE NY
2005-09-20 631-693-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 AMITYVILLE NY
2005-09-20 631-693-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 AMITYVILLE NY
2005-09-20 631-708-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BRENTWOOD NY
2005-09-20 631-750-8XXX 8000–8999Assigned ONVOY, LLC- NY 384C SAYVILLE NY
2005-09-20 631-803-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BELLPORT NY
2005-09-16 631-707-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2005-09-16 631-707-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2005-09-16 631-708-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2005-09-16 631-708-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2005-09-16 631-708-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2005-09-16 631-708-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2005-09-16 631-942-7XXX 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.