NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 484-517 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MORTONVL PA
— 484-518 1XXX2XXX3XXX5XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN29 PA
— 484-519 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EMMAUS PA
— 484-520 none assigned yet which blocks → TON80 COMMUNICATIONS, LLC 516J BIRDSBORO PA
— 484-521 0–9 XXXall 10 · 8 holders which blocks → NUSO, LLC 551G PHPHSBZN17 PA
— 484-524 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 POTTSTOWN PA
— 484-526 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BETHLEHEM PA
— 484-527 5XXX7XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN28 PA
— 484-528 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WESTTOWN PA
— 484-529 not yet reported which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
— 484-530 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN31 PA
— 484-531 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN31 PA
— 484-532 0XXX1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN31 PA
— 484-533 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN31 PA
— 484-534 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN31 PA
— 484-535 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN31 PA
— 484-537 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN31 PA
— 484-539 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → NETCARRIER TELECOM, INC. - PA 5494 PHPHSBZN31 PA
— 484-540 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN14 PA
— 484-541 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EASTON PA
— 484-544 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EASTON PA
— 484-545 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EASTON PA
— 484-546 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J EASTON PA
— 484-547 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ALLENTOWN PA
— 484-548 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J EASTON PA
— 484-549 not yet reported which blocks → ONVOY, LLC - PA 547E EASTON PA
— 484-551 1XXX2XXX3XXX5XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 LENAPE PA
— 484-552 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SCHWENKSVL PA
— 484-554 0XXX2XXX · 2 holders which blocks → METROPCS, INC. 5562 BETHLEHEM PA
— 484-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST PA
— 484-556 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J GLENMOORE PA
— 484-558 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J GLENMOORE PA
— 484-559 not yet reported which blocks → ONVOY, LLC - PA 547E GLENMOORE PA
— 484-562 3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN23 PA
— 484-563 1XXX2XXX3XXX4XXX5XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN28 PA
— 484-564 0XXX5XXX6XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 WESTTOWN PA
— 484-565 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN28 PA
— 484-567 4XXX7XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN31 PA
— 484-572 3XXX4XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN24 PA
— 484-573 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN13 PA
— 484-575 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 FLEETWOOD PA
— 484-578 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FLEETWOOD PA
— 484-580 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
— 484-581 0XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN26 PA
— 484-582 6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 484-583 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHPHSBZN26 PA
— 484-584 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN26 PA
— 484-585 0XXX3XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN26 PA
— 484-586 1XXX2XXX4XXX5XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN26 PA
— 484-588 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN26 PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.