NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 484
ONVOY, LLC - PA 7
NEW CINGULAR WIRELESS PCS, LLC - DC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
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
2004-04-07 484-553-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ALLENTOWN PA
2004-04-07 484-651-5XXX 5000–5999Assigned D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2004-04-07 484-651-7XXX 7000–7999Assigned D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2004-03-31 484-313-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WESTTOWN PA
2004-03-31 484-552-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SCHWENKSVL PA
2004-03-31 484-643-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WEST GROVE PA
2004-03-31 484-762-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROYERSFORD PA
2004-03-31 484-810-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SPRINGTOWN PA
2004-03-23 484-200-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CHESTERSPG PA
2004-03-23 484-237-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DOWNINGTN PA
2004-03-23 484-240-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CATASAUQUA PA
2004-03-23 484-241-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BETHLEHEM PA
2004-03-23 484-252-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EXTON PA
2004-03-23 484-255-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 CENTER PT PA
2004-03-23 484-272-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NORTHAMPTN PA
2004-03-23 484-281-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BATH PA
2004-03-23 484-283-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KEMBLESVL PA
2004-03-23 484-291-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NAZARETH PA
2004-03-23 484-321-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN28 PA
2004-03-23 484-334-0XXX 0000–0999Assigned D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2004-03-23 484-334-1XXX 1000–1999Assigned D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2004-03-23 484-366-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 POTTSTOWN PA
2004-03-23 484-380-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN25 PA
2004-03-23 484-393-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN29 PA
2004-03-23 484-422-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN22 PA
2004-03-23 484-436-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2004-03-23 484-440-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2004-03-23 484-452-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2004-03-23 484-461-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN17 PA
2004-03-23 484-470-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN13 PA
2004-03-23 484-514-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HONEYBROOK PA
2004-03-23 484-532-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN31 PA
2004-03-23 484-551-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2004-03-23 484-575-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FLEETWOOD PA
2004-03-23 484-580-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2004-03-23 484-601-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWTRIPOLI PA
2004-03-23 484-646-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KUTZTOWN PA
2004-03-23 484-647-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWSMITHVL PA
2004-03-23 484-660-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HAMBURG PA
2004-03-23 484-702-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 OXFORD PA
2004-03-23 484-718-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PARKESBURG PA
2004-03-23 484-720-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 AVONDALE PA
2004-03-23 484-730-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KENNETT SQ PA
2004-03-23 484-841-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN10 PA
2004-03-23 484-851-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HELLERTOWN PA
2004-03-23 484-857-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 KEMPTON PA
2004-03-23 484-901-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PUGHTOWN PA
2004-03-23 484-902-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2004-03-12 484-269-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2004-03-12 484-406-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LANDENBERG PA

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.