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 315
VERIZON NEW YORK, INC. 216
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 78
PAETEC ITEL, LLC 63
TWC IP ENABLED SERVICES, LLC 46
NEW CINGULAR WIRELESS PCS, LLC - DC 46
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 315-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 315-512 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HARRISVL NY
— 315-513 4XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LYONSFALLS NY
— 315-517 0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ALEXNDRIBY NY
— 315-521 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GENEVA NY
— 315-522 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 GOUVERNEUR NY
— 315-523 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WATERTOWN NY
— 315-524 0XXX which blocks → VERIZON NEW YORK, INC. 9104 ONTARIO NY
— 315-525 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 UTICA NY
— 315-527 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 UTICA NY
— 315-528 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MADRID NY
— 315-529 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 OSWEGO NY
— 315-531 0XXX1XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PENN YAN NY
— 315-532 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J OSWEGO NY
— 315-533 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J ROME NY
— 315-534 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 UTICA NY
— 315-535 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 GOUVERNEUR NY
— 315-536 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PENN YAN NY
— 315-537 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 HARRISVL NY
— 315-538 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J MACEDON NY
— 315-539 6XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WATERLOO NY
— 315-540 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-541 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 OGDENSBURG NY
— 315-542 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 UTICA NY
— 315-543 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 HARRISVL NY
— 315-545 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 CAMILLUS NY
— 315-546 3XXX4XXX5XXX6XXX which blocks → PAETEC ITEL, LLC 829J LIVERPOOL NY
— 315-548 not yet reported which blocks → ONTARIO TELEPHONE COMPANY, INC. 0112 PHELPS NY
— 315-549 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 FAYETTE NY
— 315-550 not yet reported which blocks → NY
— 315-551 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SYRACUSE NY
— 315-553 2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SODUS NY
— 315-554 0–9 XXXall 10 · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 SKANEATLES NY
— 315-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 315-556 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LITTLE FLS NY
— 315-557 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CLINTON NY
— 315-558 5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-559 6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-562 0XXX6XXX7XXX9XXX · 2 holders which blocks → EDWARDS TEL. CO., INC. 0092 EDWARDS NY
— 315-563 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 POPLAR RDG NY
— 315-564 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 HANNIBAL NY
— 315-566 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 POTSDAM NY
— 315-568 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SENECA FLS NY
— 315-569 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-571 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J ROME NY
— 315-573 6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEWARK NY
— 315-574 not yet reported which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 HERKIMER NY
— 315-576 2XXX3XXX4XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MARION NY
— 315-577 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C WATERLOO NY
— 315-578 not yet reported which blocks → CITIZENS TEL. CO. OF HAMMOND NY, INC. 0081 MACOMB NY

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.