NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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, all time — NPA 412
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 412-350 | 8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-351 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON4 | PA |
| — | 412-355 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-358 | 0XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-359 | 0XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-361 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON8 | PA |
| — | 412-362 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON8 | PA |
| — | 412-363 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON8 | PA |
| — | 412-364 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-365 | 4XXX5XXX8XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON8 | PA |
| — | 412-366 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-367 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-369 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-371 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON4 | PA |
| — | 412-372 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN22 | PA |
| — | 412-373 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN22 | PA |
| — | 412-374 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN22 | PA |
| — | 412-380 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN22 | PA |
| — | 412-381 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-382 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ELIZABETH | PA |
| — | 412-383 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-384 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ELIZABETH | PA |
| — | 412-388 | 2XXX4XXX8XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON6 | PA |
| — | 412-390 | 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-391 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-392 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-393 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-394 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-396 | 0XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-402 | 8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-420 | 0XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-421 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-422 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-429 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN14 | PA |
| — | 412-431 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-432 | 6XXX8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-433 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-434 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-441 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON8 | PA |
| — | 412-442 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-454 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-456 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-460 | 2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN10 | PA |
| — | 412-461 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON5 | PA |
| — | 412-462 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON5 | PA |
| — | 412-464 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON5 | PA |
| — | 412-466 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN10 | PA |
| — | 412-467 | 0XXX6XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-469 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN10 | PA |
| — | 412-470 | 6XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN15 | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.