Recent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 571-721 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN08 | VA |
| — | 571-722 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | WSNGTNZN17 | VA |
| — | 571-723 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | WSNGTNZN19 | VA |
| — | 571-777 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| — | 571-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | VA |
| — | 571-831 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | LEESBURG | VA |
| — | 571-900 | not yet reported which blocks → | VA | |||
| — | 571-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | VA |
| — | 571-921 | 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | MANASSAS | VA |
| — | 571-931 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | TRIANGLE | VA |
| — | 571-932 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | LORTONMTRO | VA |
| — | 571-933 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | DULLESMTRO | VA |
| — | 571-934 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | DULLES | VA |
| — | 571-936 | not yet reported which blocks → | WSNGTNZN08 | VA | ||
| — | 571-950 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | VA | |
| — | 571-954 | not yet reported which blocks → | VA | |||
| — | 571-958 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | VA | |
| — | 571-959 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | VA | |
| — | 571-976 | not yet reported which blocks → | VA | |||
| — | 572-210 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PEERLESS NETWORK OF OKLAHOMA, LLC - OK | 384H | CEMENT | OK |
| — | 572-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-511 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | OK |
| — | 572-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-700 | not yet reported which blocks → | OK | |||
| — | 572-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 572-950 | not yet reported which blocks → | OK | |||
| — | 572-958 | not yet reported which blocks → | OK | |||
| — | 572-959 | not yet reported which blocks → | OK | |||
| — | 572-976 | not yet reported which blocks → | OK | |||
| — | 573-204 | 3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | JACKSON | MO |
| — | 573-209 | not yet reported which blocks → | MARK TWAIN COMMUNICATIONS | 8953 | EWING | MO |
| — | 573-210 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | POTOSI | MO |
| — | 573-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | MO |
| — | 573-212 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | ORAN | MO |
| — | 573-214 | 1XXX which blocks → | BRIGHTSPEED OF MISSOURI, LLC | 9784 | COLUMBIA | MO |
| — | 573-215 | not yet reported which blocks → | MARK TWAIN COMMUNICATIONS | 8953 | LEWISTOWN | MO |
| — | 573-216 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LKOZKOSBCH | MO |
| — | 573-218 | 0XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | FARMINGTON | MO |
| — | 573-219 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | COLUMBIA | MO |
| — | 573-220 | 8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FULTON | MO |
| — | 573-221 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | HANNIBAL | MO |
| — | 573-222 | 0XXX4XXX5XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | PUXICO | MO |
| — | 573-223 | 5XXX8XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | PIEDMONT | MO |
| — | 573-224 | 1XXX2XXX4XXX8XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | GREENVILLE | MO |
| — | 573-225 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.