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 484
PAETEC ITEL, LLC 152
LEVEL 3 COMMUNICATIONS, LLC - PA 129
ONVOY, LLC - PA 78
OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 62
NEW CINGULAR WIRELESS PCS, LLC - DC 53
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
2010-04-05 484-258 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM D & E SYSTEMS, INC. - PA 4114 READING PA
2010-01-27 484-772 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING PA
2009-09-23 484-426 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALLENTOWN PA
2009-09-22 484-374 0–9 XXXall 10 · 7 holders which blocks → CTSI, INC. - PA 7513 POTTSTOWN PA
2009-09-21 484-622 0–9 XXXwhole prefix which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
2009-09-17 484-602 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2009-09-16 484-345 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2009-06-08 484-294 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ALLENTOWN PA
2009-06-04 484-355 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 READING PA
2009-04-23 484-415 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BOYERTOWN PA
2009-04-03 484-378 0–9 XXXall 10 · 6 holders which blocks → BLOCK LINE SYSTEMS, LLC - PA 784E COATESVL PA
2009-03-17 484-317 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 GREENHILLS PA
2009-03-17 484-405 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BOYERTOWN PA
2009-03-17 484-407 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 YELLOW HS PA
2009-03-13 484-236 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 DOUGLASSVL PA
2009-03-13 484-295 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BIRDSBORO PA
2009-03-13 484-304 0XXX1XXX2XXX3XXX7XXX8XXX · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 TOPTON PA
2009-03-13 484-404 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BANGOR PA
2009-03-13 484-491 0XXX1XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 OLEY PA
2008-12-04 484-401 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W CHESTER PA
2008-12-04 484-402 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W CHESTER PA
2008-09-17 484-855 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2008-06-27 484-525 0–9 XXXall 10 · 6 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2008-06-27 484-589 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PHPHSBZN10 PA
2008-05-28 484-619 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2008-05-09 484-388 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2008-04-25 484-706 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 READING PA
2008-01-10 484-818 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2007-09-26 484-661 0–9 XXXall 10 · 5 holders which blocks → CTSI, INC. - PA 7513 ALLENTOWN PA
2007-09-17 484-599 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2007-07-31 484-860 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2007-07-09 484-663 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2007-07-09 484-816 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PHPHSBZN11 PA
2007-05-15 484-350 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2007-04-26 484-777 0–9 XXXwhole prefix which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 BETHLEHEM PA
2007-02-14 484-797 0–9 XXXall 10 · 2 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2006-10-16 484-538 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2006-08-02 484-593 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J DOWNINGTN PA
2006-07-14 484-866 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ALLENTOWN PA
2006-04-06 484-274 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2006-04-06 484-560 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2006-04-06 484-809 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2006-03-14 484-550 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2006-02-09 484-594 1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NETCARRIER TELECOM, INC. - PA 5494 PHPHSBZN31 PA
2005-07-01 484-264 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2005-04-27 484-238 0–9 XXXall 10 · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
2005-02-03 484-615 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN28 PA
2004-05-24 484-906 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN21 PA
2004-01-13 484-266 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J W CHESTER PA
2003-01-22 484-788 0–9 XXXall 10 · 3 holders which blocks → CTSI, INC. - PA 7513 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.