NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

21 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, last 30 days — NPA 223
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 4
ONVOY, LLC - PA 3
NEW CINGULAR WIRELESS PCS, LLC - DC 3
BOOST SUBSCRIBERCO L.L.C. 2
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
2018-10-17 223-200-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 YORK PA
2018-10-12 223-444-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANCASTER PA
2018-10-12 223-444-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANCASTER PA
2018-10-10 223-322-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-322-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-322-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-322-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-800-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-800-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-800-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-800-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-10 223-800-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-10-03 223-212-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CARLISLE PA
2018-10-01 223-212-0XXX 0000–0999Assigned ONVOY, LLC - PA 547E CARLISLE PA
2018-10-01 223-212-1XXX 1000–1999Assigned ONVOY, LLC - PA 547E CARLISLE PA
2018-09-26 223-206-1XXX 1000–1999Assigned ONVOY, LLC - PA 547E FAYETTEVL PA
2018-09-26 223-206-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E FAYETTEVL PA
2018-09-26 223-207-1XXX 1000–1999Assigned ONVOY, LLC - PA 547E COLUMBIA PA
2018-09-26 223-207-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E COLUMBIA PA
2018-09-26 223-747-3XXX 3000–3999Assigned ONVOY, LLC - PA 547E EASTBERLIN PA
2018-09-26 223-747-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E EASTBERLIN PA
2018-09-21 223-201-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E BIGLERVL PA
2018-09-21 223-204-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E ICKESBURG PA
2018-09-21 223-209-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E MTHOLLYSPG PA
2018-09-21 223-400-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E HANOVER PA
2018-09-18 223-210-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DENVER PA
2018-09-17 223-747-0XXX 0000–0999Assigned PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E EASTBERLIN PA
2018-09-04 223-308-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MILLERSVL PA
2018-08-31 223-747-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E EASTBERLIN PA
2018-08-31 223-747-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E EASTBERLIN PA
2018-08-28 223-203-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F AIRVILLE PA
2018-08-28 223-203-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F AIRVILLE PA
2018-08-28 223-322-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HARISBGZN1 PA
2018-08-27 223-209-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F MTHOLLYSPG PA
2018-08-17 223-206-0XXX 0000–0999Assigned ONVOY, LLC - PA 547E FAYETTEVL PA
2018-08-17 223-207-0XXX 0000–0999Assigned ONVOY, LLC - PA 547E COLUMBIA PA
2018-08-17 223-208-0XXX 0000–0999Assigned ONVOY, LLC - PA 547E LEWISTOWN PA
2018-08-13 223-322-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2018-08-13 223-322-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2018-08-09 223-200-3XXX 3000–3999Assigned TELNYX LLC 073H YORK PA
2018-07-31 223-205-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F MARION PA
2018-07-18 223-205-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MARION PA
2018-07-02 223-204-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F ICKESBURG PA
2018-06-21 223-203-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F AIRVILLE PA
2018-06-21 223-203-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F AIRVILLE PA
2018-06-21 223-322-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H HARISBGZN1 PA
2018-06-13 223-333-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEBANON PA
2018-06-13 223-333-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEBANON PA
2018-06-13 223-333-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEBANON PA
2018-06-12 223-201-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BIGLERVL PA

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.