NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

19 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 445
ONVOY, LLC - PA 8
BANDWIDTH.COM CLEC, LLC - PA 5
NEW CINGULAR WIRELESS PCS, LLC - DC 4
EXIANT COMMUNICATIONS LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 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
2018-08-30 445-800-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN3 PA
2018-08-30 445-800-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN3 PA
2018-08-30 445-800-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN3 PA
2018-08-30 445-800-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN3 PA
2018-08-30 445-800-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN3 PA
2018-08-30 445-800-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN3 PA
2018-07-18 445-888-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2018-07-18 445-888-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2018-07-18 445-888-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2018-06-27 445-888-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHLDLPHZN2 PA
2018-06-25 445-544-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H PHLDLPHZN1 PA
2018-06-07 445-200-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 QUAKERTOWN PA
2018-06-07 445-200-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 QUAKERTOWN PA
2018-06-07 445-200-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 QUAKERTOWN PA
2018-06-06 445-500-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN40 PA
2018-06-06 445-500-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN40 PA
2018-06-06 445-500-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN40 PA
2018-06-06 445-600-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN39 PA
2018-06-06 445-600-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN39 PA
2018-06-06 445-600-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN39 PA
2018-05-11 445-222-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PENNSBURG PA
2018-05-11 445-666-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 GREEN LANE PA
2018-05-11 445-777-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 YARDLEY PA
2018-05-10 445-444-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2018-05-10 445-444-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2018-05-10 445-444-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2018-04-26 445-888-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN2 PA
2018-04-12 445-737-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-04-12 445-737-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-03-13 445-888-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHLDLPHZN2 PA
2018-03-08 445-333-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F QUAKERTOWN PA
2018-03-08 445-800-1XXX 1000–1999Assigned METROPCS, INC. 5562 PHLDLPHZN3 PA
2018-03-05 445-999-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARLEYSVL PA
2018-02-08 445-333-1XXX 1000–1999Assigned METROPCS, INC. 5562 QUAKERTOWN PA
2018-01-18 445-666-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E GREEN LANE PA
2018-01-15 445-222-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E PENNSBURG PA
2018-01-15 445-333-3XXX 3000–3999Assigned ONVOY, LLC - PA 547E QUAKERTOWN PA
2018-01-15 445-333-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E QUAKERTOWN PA
2018-01-15 445-428-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN2 PA
2018-01-15 445-428-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN2 PA
2018-01-15 445-428-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN2 PA
2018-01-15 445-428-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN2 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.