NumberResearch Membership · Data 10/01/2026

Recent prefix assignments

374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026

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 28
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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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 513-433 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MIDDLETOWN OH
— 513-434 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J REILY OH
— 513-435 6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MIDDLETOWN OH
— 513-436 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J WILLIAMSBG OH
— 513-437 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SEVEN MILE OH
— 513-443 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETHANY OH
— 513-444 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LTL MIAMI OH
— 513-447 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J SHANDON OH
— 513-451 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-452 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HARRISON OH
— 513-453 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LTL MIAMI OH
— 513-454 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HAMILTON OH
— 513-455 0XXX which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-456 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NEWTONSVL OH
— 513-457 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BETHEL OH
— 513-458 9XXX which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-459 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MASON OH
— 513-460 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-461 0XXX2XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 OXFORD OH
— 513-463 1XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BETHANY OH
— 513-464 4XXX5XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MIDDLETOWN OH
— 513-465 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MIDDLETOWN OH
— 513-467 8XXX which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-469 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-470 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-471 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-473 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-474 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-475 3XXX which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-476 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-477 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-478 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-479 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-480 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B SO LEBANON OH
— 513-481 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-482 0XXX1XXX9XXX which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-483 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-484 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-487 0XXX8XXX9XXX which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-489 not yet reported which blocks → CINCINNATI BELL 9348 CINCINNATI OH
— 513-490 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-492 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 MASON OH
— 513-493 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H CINCINNATI OH
— 513-494 3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 SO LEBANON OH
— 513-497 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-498 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-502 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-503 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-504 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
— 513-505 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.