NumberResearchRecent 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.
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 |
|---|---|---|---|---|---|---|
| — | 419-993 | not yet reported which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | LIMA | OH |
| — | 419-994 | 9XXX which blocks → | FRONTIER NORTH, INC. - OH | 0615 | LOUDONVL | OH |
| — | 419-995 | not yet reported which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | LIMA | OH |
| — | 419-996 | 8XXX9XXX which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | LIMA | OH |
| — | 419-998 | not yet reported which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | LIMA | OH |
| — | 419-999 | 8XXX which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | LIMA | OH |
| — | 423-204 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | XXXXXXXXXX | TN |
| — | 423-207 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MIDWAY | TN |
| — | 423-209 | 0XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CHATTNOOGA | TN |
| — | 423-210 | 4XXX which blocks → | UNITED STATES CELLULAR - TN | 6278 | TELLICO PL | TN |
| — | 423-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TN |
| — | 423-214 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | UNITED STATES CELLULAR - TN | 6278 | ENGLEWOOD | TN |
| — | 423-221 | not yet reported which blocks → | SPOK, INC. | 6630 | CHATTNOOGA | TN |
| — | 423-224 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | KINGSPORT | TN |
| — | 423-225 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | BENTON | TN |
| — | 423-227 | not yet reported which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-228 | 0–9 XXXall 10 · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | SO PITTSBG | TN |
| — | 423-229 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | KINGSPORT | TN |
| — | 423-230 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | KINGSPORT | TN |
| — | 423-231 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MORRISTOWN | TN |
| — | 423-232 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | JOHNSON CY | TN |
| — | 423-233 | not yet reported which blocks → | PRO PAGE PARTNERS, LLC | 6880 | JOHNSON CY | TN |
| — | 423-234 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | BAILEYTON | TN |
| — | 423-235 | 8XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | BULLS GAP | TN |
| — | 423-236 | 0XXX8XXX9XXX · 3 holders which blocks → | BRIGHTSPEED OF SOUTHERN TENNESSEE, LC | 0574 | APISON | TN |
| — | 423-237 | 6XXX7XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NEWPORT | TN |
| — | 423-238 | not yet reported which blocks → | BRIGHTSPEED OF SOUTHERN TENNESSEE, LC | 0574 | OOLTEWAH | TN |
| — | 423-239 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | MIDWAY SUL | TN |
| — | 423-240 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| — | 423-242 | 3XXX5XXX8XXX · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | CHATTNOOGA | TN |
| — | 423-243 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | SODDYDAISY | TN |
| — | 423-244 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | CLEVELAND | TN |
| — | 423-245 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | KINGSPORT | TN |
| — | 423-246 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | KINGSPORT | TN |
| — | 423-247 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | KINGSPORT | TN |
| — | 423-248 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | UNITED STATES CELLULAR - TN | 6278 | NEWPORT | TN |
| — | 423-249 | 3XXX7XXX9XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FORK RIDGE | TN |
| — | 423-252 | 0XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | ATHENS | TN |
| — | 423-253 | none assigned yet which blocks → | TELLICO TEL. CO., INC. | 0578 | TELLICO PL | TN |
| — | 423-254 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | MORRISTOWN | TN |
| — | 423-255 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-256 | 2XXX3XXX4XXX5XXX · 3 holders which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | CHURCHHILL | TN |
| — | 423-257 | not yet reported which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | LIMESTONE | TN |
| — | 423-258 | 0XXX1XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MORRISTOWN | TN |
| — | 423-261 | none assigned yet which blocks → | TELLICO TEL. CO., INC. | 0578 | COKERCREEK | TN |
| — | 423-262 | 3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 4510 | JOHNSON CY | TN |
| — | 423-263 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | ETOWAH | TN |
| — | 423-265 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CHATTNOOGA | TN |
| — | 423-266 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CHATTNOOGA | TN |
| — | 423-267 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CHATTNOOGA | TN |
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.