NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 610
VERIZON PENNSYLVANIA, INC. 325
NEW CINGULAR WIRELESS PCS, LLC - DC 56
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 43
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 39
TELEPORT COMMUNICATIONS AMERICA, LLC - PA 38
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2026-02-17 610-460 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E ALLENTOWN PA
2025-05-15 610-752 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN23 PA
2024-03-12 610-817 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - PA 547E EMMAUS PA
2023-07-10 610-920 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
2023-07-07 610-835 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 SLATINGTON PA
2022-04-08 610-267 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN30 PA
2021-12-08 610-472 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHPHSBZN17 PA
2021-10-08 610-773 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D PHPHSBZN10 PA
2021-03-11 610-424 0–9 XXXwhole prefix which blocks → ONVOY, LLC - PA 547E ALLENTOWN PA
2020-05-27 610-610 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H MORGANTOWN PA
2020-04-16 610-483 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ALLENTOWN PA
2018-10-20 610-477 9XXX which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F ALLENTOWN PA
2018-10-04 610-484 0–9 XXXall 10 · 8 holders which blocks → AIRESPRING, INC. 996H READING PA
2018-09-24 610-890 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E AVONDALE PA
2018-08-31 610-412 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PUGHTOWN PA
2018-06-29 610-936 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 551G BETHLEHEM PA
2018-06-06 610-215 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN30 PA
2017-09-18 610-445 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BELVIDERE PA
2012-01-25 610-674 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2011-11-17 610-314 0–9 XXXall 10 · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 W CHESTER PA
2011-09-22 610-816 0–9 XXXall 10 · 6 holders which blocks → WINDSTREAM D & E SYSTEMS, INC. - PA 4114 READING PA
2009-06-08 610-714 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 LEHIGHTON PA
2009-03-12 610-214 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 COOPERSBG PA
2009-03-12 610-735 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 IRONTON PA
2009-02-10 610-679 0–9 XXXall 10 · 9 holders which blocks → METROPCS, INC. 5562 COATESVL PA
2008-10-15 610-979 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → COMCAST IP PHONE, LLC 318J ATGLEN PA
2008-09-24 610-732 0–9 XXXall 10 · 5 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 W CHESTER PA
2008-06-11 610-556 0XXX2XXX5XXX6XXX7XXX · 5 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 UHLERSTOWN PA
2008-05-02 610-985 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J READING PA
2007-05-10 610-493 2XXX which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 OLEY PA
2007-05-10 610-575 2XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 BIRDSBORO PA
2007-05-10 610-875 6XXX which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 GREENHILLS PA
2007-05-10 610-899 2XXX8XXX · 2 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 TOPTON PA
2007-05-10 610-919 2XXX9XXX · 2 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 YELLOW HS PA
2007-05-10 610-953 1XXX which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 DOUGLASSVL PA
2007-05-01 610-901 0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 MORGANTOWN PA
2007-04-30 610-302 0–9 XXXall 10 · 2 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 BOYERTOWN PA
2007-04-30 610-652 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 SASSAMNSVL PA
2007-04-30 610-702 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 BALLY PA
2007-04-18 610-467 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C OXFORD PA
2006-03-08 610-741 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 READING PA
2005-08-30 610-969 0–9 XXXall 10 · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALLENTOWN PA
2005-02-01 610-340 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J POTTSTOWN PA
2004-01-09 610-881 4XXX5XXX6XXX7XXX · 4 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 PEN ARGYL PA
2002-09-27 610-500 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN10 PA
2002-09-27 610-550 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 PHPHSBZN22 PA
2002-09-27 610-551 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 PHPHSBZN30 PA
2002-09-27 610-609 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN21 PA
2002-09-27 610-710 4XXX5XXX7XXX · 3 holders which blocks → METROPCS, INC. 5562 PHPHSBZN26 PA
2002-09-27 610-739 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.