NumberResearchRecent prefix assignments
374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026
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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Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 503-644 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-645 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-646 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-647 | 3XXX4XXX6XXX8XXX which blocks → | QWEST CORPORATION | 9638 | NORTH PL | OR |
| — | 503-648 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-649 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-650 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-651 | not yet reported which blocks → | CANBY TEL. ASSN. | 2362 | CANBYNEEDY | OR |
| — | 503-652 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-653 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-654 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-655 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-656 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-657 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-658 | 9XXX which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-659 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-660 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-661 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-662 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | YAMHILL | OR |
| — | 503-663 | 8XXX which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-665 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-666 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-667 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-668 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-669 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-670 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-671 | none assigned yet which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-672 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-673 | 1XXX2XXX3XXX6XXX8XXX9XXX which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-674 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | GRESHAM | OR |
| — | 503-675 | not yet reported which blocks → | QWEST CORPORATION | 9638 | CLACKAMAS | OR |
| — | 503-676 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OR | 7531 | GRESHAM | OR |
| — | 503-677 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-678 | 9XXX which blocks → | CENTURYTEL OF OREGON, INC. DBA CENTURYLINK | 2395 | AURORA | OR |
| — | 503-679 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | PORTLAND | OR |
| — | 503-680 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | PORTLAND | OR |
| — | 503-681 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-682 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-683 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OR | 7531 | CLACKAMAS | OR |
| — | 503-684 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-685 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-686 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OR | 7531 | BEAVERTON | OR |
| — | 503-687 | not yet reported which blocks → | PACIFIC WAVE COMMUNICATIONS | 4697 | MCMINNVL | OR |
| — | 503-688 | 0XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | PORTLAND | OR |
| — | 503-689 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALEM | OR |
| — | 503-690 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-691 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-692 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | STFRD-SNDY | OR |
| — | 503-693 | not yet reported which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4323 | BEAVERTON | OR |
| — | 503-694 | 3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | CENTURYTEL OF OREGON, INC. DBA CENTURYLINK | 2395 | CHARBONNEU | OR |
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.