NumberResearchRecent prefix assignments
355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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
New assignments by month
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 914-493 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN07 | NY |
| — | 914-495 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | PLEASANTVL | NY |
| — | 914-499 | 0XXX3XXX8XXX9XXX · 2 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | ARMONK VLG | NY |
| — | 914-500 | 3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WSCHSTZN03 | NY |
| — | 914-502 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | OSSINING | NY |
| — | 914-503 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | POUGHKEPSI | NY |
| — | 914-505 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-506 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-509 | 4XXX7XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | WSCHSTZN01 | NY |
| — | 914-511 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | NY |
| — | 914-513 | 1XXX4XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | WSCHSTZN01 | NY |
| — | 914-514 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | MOUNTKISCO | NY |
| — | 914-517 | 0XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | WSCHSTZN08 | NY |
| — | 914-519 | 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | MAHOPAC | NY |
| — | 914-522 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| — | 914-523 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| — | 914-524 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN07 | NY |
| — | 914-525 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-526 | 1XXX7XXX · 2 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | LAKELAND | NY |
| — | 914-527 | none assigned yet which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NANUET | NY |
| — | 914-528 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | LAKELAND | NY |
| — | 914-529 | 0–9 XXXall 10 · 7 holders which blocks → | ONVOY, LLC- NY | 384C | WSCHSTZN05 | NY |
| — | 914-532 | not yet reported which blocks → | AMERICAN NETWORK, INC. | 8667 | OSSINING | NY |
| — | 914-533 | 0XXX1XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | LEWISBORO | NY |
| — | 914-536 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-539 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-541 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NEWBURGH | NY |
| — | 914-542 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NEWBURGH | NY |
| — | 914-544 | not yet reported which blocks → | SPOK, INC. | 6630 | WSCHSTZN08 | NY |
| — | 914-545 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | WSCHSTZN08 | NY |
| — | 914-548 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-551 | not yet reported which blocks → | SPOK, INC. | 6630 | WSCHSTZN08 | NY |
| — | 914-552 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN06 | NY |
| — | 914-553 | not yet reported which blocks → | SPOK, INC. | 6630 | WSCHSTZN08 | NY |
| — | 914-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | NY |
| — | 914-558 | not yet reported which blocks → | AQUIS COMMUNICATIONS, INC. | 6919 | WSCHSTZN08 | NY |
| — | 914-559 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-560 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | WSCHSTZN03 | NY |
| — | 914-570 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | AT&T - LOCAL | 7421 | WSCHSTZN07 | NY |
| — | 914-572 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSCHSTZN08 | NY |
| — | 914-576 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN03 | NY |
| — | 914-580 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | WSCHSTZN07 | NY |
| — | 914-582 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| — | 914-584 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| — | 914-585 | not yet reported which blocks → | SPOK, INC. | 6630 | MT VERNON | NY |
| — | 914-588 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| — | 914-589 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN08 | NY |
| — | 914-591 | none assigned yet which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN04 | NY |
| — | 914-592 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN07 | NY |
| — | 914-593 | 3XXX9XXX · 2 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN07 | 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.