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
— 484-449 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
— 484-450 6XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN21 PA
— 484-451 4XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN21 PA
— 484-452 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN21 PA
— 484-453 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - PA 547E PHPHSBZN21 PA
— 484-454 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN21 PA
— 484-455 3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN21 PA
— 484-457 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
— 484-458 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN21 PA
— 484-461 0XXX1XXX2XXX5XXX · 3 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN17 PA
— 484-462 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN17 PA
— 484-463 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN17 PA
— 484-465 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E PHPHSBZN17 PA
— 484-466 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN17 PA
— 484-467 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W CHESTER PA
— 484-468 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN12 PA
— 484-469 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN17 PA
— 484-470 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN13 PA
— 484-471 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN13 PA
— 484-472 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN13 PA
— 484-474 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN13 PA
— 484-475 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN13 PA
— 484-476 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN24 PA
— 484-477 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN13 PA
— 484-478 1XXX2XXX3XXX4XXX which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN13 PA
— 484-479 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN13 PA
— 484-480 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PHPHSBZN11 PA
— 484-481 0–9 XXXwhole prefix which blocks → HD CARRIER LLC 321J W CHESTER PA
— 484-482 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN11 PA
— 484-483 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN11 PA
— 484-485 0XXX1XXX2XXX3XXX7XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN11 PA
— 484-486 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN11 PA
— 484-487 1XXX2XXX3XXX7XXX · 4 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN11 PA
— 484-489 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN11 PA
— 484-490 3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN11 PA
— 484-492 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN14 PA
— 484-493 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN14 PA
— 484-494 1XXX2XXX7XXX · 2 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN14 PA
— 484-496 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN14 PA
— 484-497 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN14 PA
— 484-498 2XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN14 PA
— 484-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PUGHTOWN PA
— 484-504 9XXX which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 NEWSMITHVL PA
— 484-505 0XXX6XXX8XXX9XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALLENTOWN PA
— 484-508 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LANDENBERG PA
— 484-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 484-514 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HONEYBROOK PA
— 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

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.