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
— 484-381 0XXX1XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN25 PA
— 484-382 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → IP HORIZON LLC 515J PHPHSBZN25 PA
— 484-383 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN25 PA
— 484-384 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN25 PA
— 484-385 3XXX4XXX8XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN25 PA
— 484-386 2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN25 PA
— 484-389 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN25 PA
— 484-390 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN29 PA
— 484-391 7XXX which blocks → PAETEC ITEL, LLC 829J PHPHSBZN29 PA
— 484-392 0–9 XXXall 10 · 7 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN29 PA
— 484-393 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN29 PA
— 484-394 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN29 PA
— 484-396 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → THE VOICE APPLICATION NETWORK, LLC 507J PHPHSBZN29 PA
— 484-397 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALLENTOWN PA
— 484-398 1XXX2XXX3XXX5XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN29 PA
— 484-399 1XXX4XXX7XXX which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN29 PA
— 484-406 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J LANDENBERG PA
— 484-409 not yet reported which blocks → ONVOY, LLC - PA 547E LANDENBERG PA
— 484-410 0XXX2XXX · 2 holders which blocks → METROPCS, INC. 5562 PHPHSBZN24 PA
— 484-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 484-412 4XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN24 PA
— 484-413 1XXX2XXX4XXX6XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN24 PA
— 484-414 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN24 PA
— 484-416 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN24 PA
— 484-417 1XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN24 PA
— 484-418 0XXX4XXX5XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN24 PA
— 484-419 1XXX2XXX3XXX5XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN24 PA
— 484-420 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN22 PA
— 484-421 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN22 PA
— 484-422 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHPHSBZN22 PA
— 484-423 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN22 PA
— 484-424 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN22 PA
— 484-427 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN22 PA
— 484-428 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H PHPHSBZN22 PA
— 484-429 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN23 PA
— 484-430 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN23 PA
— 484-431 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN23 PA
— 484-432 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN23 PA
— 484-433 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN23 PA
— 484-434 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN23 PA
— 484-435 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E PHPHSBZN23 PA
— 484-436 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN23 PA
— 484-437 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN23 PA
— 484-438 2XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN23 PA
— 484-439 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN23 PA
— 484-440 0XXX1XXX2XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PHPHSBZN12 PA
— 484-441 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN12 PA
— 484-442 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PHPHSBZN12 PA
— 484-443 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN12 PA
— 484-444 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN12 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.