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 724
VERIZON PENNSYLVANIA, INC. 166
TELEPORT COMMUNICATIONS AMERICA, LLC - PA 74
LEVEL 3 COMMUNICATIONS, LLC - PA 69
NEW CINGULAR WIRELESS PCS, LLC - IL 60
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 59
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
2001-03-12 724-953 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 GREENSBURG PA
2001-03-12 724-997 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 MONONGAHLA PA
2001-02-09 724-234 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BUTLER PA
2001-01-31 724-217 6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENSBURG PA
2001-01-31 724-328 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WASHINGTON PA
2001-01-31 724-351 3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGDALE PA
2001-01-31 724-531 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WASHINGTON PA
2001-01-31 724-826 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGDALE PA
2001-01-29 724-215 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 8597 BURGETTSTN PA
2001-01-29 724-268 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BELLEVRNON PA
2001-01-29 724-269 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MERCER PA
2001-01-29 724-363 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FAYETTE CY PA
2001-01-29 724-364 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BROWNSVL PA
2001-01-29 724-473 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ZELIENOPLE PA
2001-01-29 724-749 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CANONSBURG PA
2001-01-19 724-259 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LIGONIER PA
2001-01-19 724-519 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EXPORT PA
2001-01-19 724-578 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 JEANNETTE PA
2001-01-19 724-597 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CANONSBURG PA
2001-01-19 724-613 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MTPLEASANT PA
2001-01-04 724-227 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 IMPERIAL PA
— 724-202 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 NEW CASTLE PA
— 724-203 2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 ALIQUIPPA PA
— 724-204 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 MTPLEASANT PA
— 724-206 3XXX5XXX6XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 WASHINGTON PA
— 724-207 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WASHINGTON PA
— 724-208 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UNIONTOWN PA
— 724-209 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 AVELLA PA
— 724-210 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 XXXXXXXXXX PA
— 724-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 724-212 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 NEWKNSNGTN PA
— 724-213 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 8597 IMPERIAL PA
— 724-214 not yet reported which blocks → BRIGHTSPEED OF PENNSYLVANIA, LLC 0209 BUTLER PA
— 724-216 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 GREENSBURG PA
— 724-218 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 IMPERIAL PA
— 724-219 3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 GREENSBURG PA
— 724-222 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 WASHINGTON PA
— 724-223 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 WASHINGTON PA
— 724-224 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 TARENTUM PA
— 724-225 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 WASHINGTON PA
— 724-226 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 TARENTUM PA
— 724-228 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 WASHINGTON PA
— 724-229 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 WASHINGTON PA
— 724-230 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 TARENTUM PA
— 724-235 0XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 NEWFLORNCE PA
— 724-238 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 LIGONIER PA
— 724-239 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF PENNSYLVANIA CO 0145 BENTLEYVL PA
— 724-240 0XXX3XXX6XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 AMBRIDGE PA
— 724-241 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BADEN PA
— 724-242 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 BADEN 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.