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 |
|---|---|---|---|---|---|---|
| — | 412-471 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-472 | 7XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN15 | PA |
| — | 412-473 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON4 | PA |
| — | 412-474 | 0XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN15 | PA |
| — | 412-476 | 0XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON5 | PA |
| — | 412-481 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-485 | 1XXX8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-486 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN18 | PA |
| — | 412-487 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN18 | PA |
| — | 412-488 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-490 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN14 | PA |
| — | 412-492 | 3XXX4XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN18 | PA |
| — | 412-493 | none assigned yet which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN15 | PA |
| — | 412-494 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN14 | PA |
| — | 412-497 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-513 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-520 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON7 | PA |
| — | 412-521 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-531 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON6 | PA |
| — | 412-544 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-552 | 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-553 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-560 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-561 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON6 | PA |
| — | 412-562 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-563 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON6 | PA |
| — | 412-565 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-566 | 3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-571 | 4XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON6 | PA |
| — | 412-572 | 0XXX1XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON6 | PA |
| — | 412-574 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-575 | 1XXX4XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-577 | 6XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-578 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-579 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-594 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-604 | 0XXX3XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN15 | PA |
| — | 412-605 | 2XXX4XXX7XXX8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-621 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-622 | 4XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-623 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-624 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-630 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-633 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-635 | 6XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN17 | PA |
| — | 412-636 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON4 | PA |
| — | 412-641 | 0XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-642 | 3XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-644 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-645 | 0XXX1XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | 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.