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 717
VERIZON PENNSYLVANIA, INC. 121
BRIGHTSPEED OF PENNSYLVANIA, LLC 80
NEW CINGULAR WIRELESS PCS, LLC - DC 77
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 72
LEVEL 3 COMMUNICATIONS, LLC - PA 65
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
2011-03-07 717-224 0–9 XXXall 10 · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 LANCASTER PA
2011-03-07 717-758 0–9 XXXwhole prefix which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 YORK PA
2010-11-10 717-553 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LANCASTER PA
2010-09-14 717-819 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 YORK PA
2010-09-09 717-686 0–9 XXXall 10 · 3 holders which blocks → BLOCK LINE SYSTEMS, LLC - PA 784E HARISBGZN1 PA
2010-07-27 717-882 0–9 XXXall 10 · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 ELIZABTHVL PA
2010-06-14 717-462 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CARLISLE PA
2010-03-26 717-205 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM D & E SYSTEMS, INC. - PA 4114 LANCASTER PA
2010-03-10 717-344 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER PA
2009-10-15 717-590 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J MECHANCSBG PA
2009-09-21 717-461 0–9 XXXall 10 · 4 holders which blocks → CTSI, INC. - PA 7513 HARISBGZN1 PA
2009-08-04 717-366 0–9 XXXall 10 · 5 holders which blocks → BRIGHTSPEED OF PENNSYLVANIA, LLC 0209 ELIZABTHTN PA
2009-06-12 717-374 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2009-06-11 717-916 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 YORK PA
2009-03-18 717-212 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 LEWISBERRY PA
2009-03-18 717-219 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 SHELLSVL PA
2009-03-18 717-282 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PORT ROYAL PA
2009-03-18 717-400 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 YORK SPG PA
2009-03-18 717-452 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 MERCERSBG PA
2009-03-18 717-523 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 TOWER CITY PA
2009-03-18 717-539 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 MCALISTRVL PA
2009-03-18 717-631 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 RICHFIELD PA
2009-03-18 717-748 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 ST THOMAS PA
2009-03-18 717-895 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 GREENCASTL PA
2009-03-18 717-922 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 THOMPSONTN PA
2009-03-18 717-946 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 REEDSVILLE PA
2009-03-17 717-281 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 EWATERFORD PA
2009-03-17 717-408 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 FAIRFIELD PA
2009-03-17 717-493 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 DRY RUN PA
2009-03-16 717-402 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BELLEVILLE PA
2009-03-16 717-403 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 ALLENSVL PA
2009-02-19 717-331 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHAMBERSBG PA
2009-01-02 717-809 0–9 XXXall 10 · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 CHAMBERSBG PA
2008-11-05 717-826 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LANCASTER PA
2008-10-15 717-488 0–9 XXXall 10 · 9 holders which blocks → COMCAST IP PHONE, LLC 318J TERRE HILL PA
2008-10-15 717-923 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J RAWLINSVL PA
2008-10-15 717-955 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J HENSEL PA
2008-10-10 717-613 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J KIRKWOOD PA
2008-10-10 717-929 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J INTERCOURS PA
2008-10-09 717-952 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J MILLERSBG PA
2008-10-08 717-822 not yet reported which blocks → COMCAST IP PHONE, LLC 318J LEWISBERRY PA
2008-09-08 717-327 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER PA
2008-09-05 717-723 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 LANCASTER PA
2008-08-13 717-501 0–9 XXXall 10 · 5 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C RED LION PA
2008-08-11 717-466 0–9 XXXall 10 · 2 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 EPHRATA PA
2008-07-18 717-881 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 YORK PA
2008-07-15 717-698 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HANOVER PA
2008-07-15 717-814 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 YORK PA
2008-06-24 717-585 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F HARISBGZN1 PA
2008-04-10 717-559 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM D & E SYSTEMS, INC. - PA 4114 DAUPHIN 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.