NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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 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
2020-09-18 223-225-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HARISBGZN1 PA
2020-09-18 223-232-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J YORK PA
2020-09-17 223-529-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LANCASTER PA
2020-09-17 223-529-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LANCASTER PA
2020-09-17 223-529-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LANCASTER PA
2020-09-11 223-245-0XXX 0000–0999Assigned TELNYX LLC 073H ANNVILLE PA
2020-09-01 223-239-6XXX 6000–6999Assigned FINGER LAKES TECHNOLOGIES GROUP, INC. - PA 464H HARISBGZN1 PA
2020-08-31 223-842-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 NEWVILLE PA
2020-08-27 223-237-1XXX 1000–1999Assigned NUSO, LLC 478J HARISBGZN1 PA
2020-08-26 223-263-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F RED LION PA
2020-08-26 223-263-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F RED LION PA
2020-08-17 223-242-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARIETTA PA
2020-08-08 223-336-3XXX 3000–3999Assigned METROPCS, INC. 5562 CARLISLE PA
2020-08-08 223-529-0XXX 0000–0999Assigned METROPCS, INC. 5562 LANCASTER PA
2020-08-08 223-529-1XXX 1000–1999Assigned METROPCS, INC. 5562 LANCASTER PA
2020-08-08 223-529-5XXX 5000–5999Assigned METROPCS, INC. 5562 LANCASTER PA
2020-08-06 223-345-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CHAMBERSBG PA
2020-08-06 223-345-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CHAMBERSBG PA
2020-08-06 223-345-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CHAMBERSBG PA
2020-07-29 223-201-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 BIGLERVL PA
2020-07-22 223-226-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E MANHEIM PA
2020-07-22 223-263-3XXX 3000–3999Assigned ONVOY, LLC - PA 547E RED LION PA
2020-07-22 223-732-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E PALMYRA PA
2020-07-22 223-732-3XXX 3000–3999Assigned ONVOY, LLC - PA 547E PALMYRA PA
2020-07-22 223-766-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E MERCERSBG PA
2020-07-22 223-766-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E MERCERSBG PA
2020-07-22 223-924-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E FAIRFIELD PA
2020-07-22 223-924-9XXX 9000–9999Assigned ONVOY, LLC - PA 547E FAIRFIELD PA
2020-07-22 223-977-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E PORT ROYAL PA
2020-07-22 223-977-9XXX 9000–9999Assigned ONVOY, LLC - PA 547E PORT ROYAL PA
2020-07-21 223-600-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E LIVERPOOL PA
2020-07-21 223-600-5XXX 5000–5999Assigned ONVOY, LLC - PA 547E LIVERPOOL PA
2020-07-09 223-221-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 LANCASTER PA
2020-07-09 223-231-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2020-07-09 223-231-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2020-07-09 223-231-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2020-07-09 223-231-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2020-07-09 223-231-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2020-06-24 223-234-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H HARISBGZN1 PA
2020-06-24 223-234-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HARISBGZN1 PA
2020-06-03 223-231-2XXX 2000–2999Assigned METROPCS, INC. 5562 HARISBGZN1 PA
2020-06-03 223-231-3XXX 3000–3999Assigned METROPCS, INC. 5562 HARISBGZN1 PA
2020-06-01 223-308-3XXX 3000–3999Assigned PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E MILLERSVL PA
2020-05-29 223-336-8XXX 8000–8999Assigned FRACTEL, LLC 965H CARLISLE PA
2020-05-29 223-348-6XXX 6000–6999Assigned FRACTEL, LLC 965H DOVER PA
2020-05-29 223-465-8XXX 8000–8999Assigned FRACTEL, LLC 965H GREENCASTL PA
2020-05-29 223-529-3XXX 3000–3999Assigned FRACTEL, LLC 965H LANCASTER PA
2020-05-29 223-529-9XXX 9000–9999Assigned FRACTEL, LLC 965H LANCASTER PA
2020-05-29 223-732-5XXX 5000–5999Assigned FRACTEL, LLC 965H PALMYRA PA
2020-05-29 223-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H MECHANCSBG 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.