NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-10-29 484-543 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E ROBESONIA PA
2018-10-29 520-412 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TOMBSTONE AZ
2018-10-29 539-629 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2018-10-29 581-849 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2018-10-29 603-506 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2018-10-29 651-364 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2018-10-29 682-279 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F GRANBURY TX
2018-10-29 727-933 0–9 XXXall 10 · 6 holders which blocks → INVOXIO INCORPORATED 158H HUDSON FL
2018-10-29 727-977 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H CLEARWATER FL
2018-10-29 731-278 4XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CYPRESS TN
2018-10-29 763-294 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2018-10-29 825-412 not yet reported which blocks → TELUS 8084 Grande Prairie —
2018-10-29 901-478 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-29 913-347 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF KANSAS, LLC - KS 018H TONGANOXIE KS
2018-10-29 940-286 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F PILOTPOINT TX
2018-10-29 985-298 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F PIERREPART LA
2018-10-26 202-893 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2018-10-26 432-800 0XXX2XXX4XXX8XXX · 4 holders which blocks → USFON, INC. - TX 473F MIDLAND TX
2018-10-26 458-899 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H REDMOND OR
2018-10-26 551-291 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 RAMSEY NJ
2018-10-26 727-677 0–9 XXXall 10 · 4 holders which blocks → INVOXIO INCORPORATED 158H STPETERSBG FL
2018-10-26 785-553 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - KS 205F BALDWIN KS
2018-10-26 813-665 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H ZEPHYRHILS FL
2018-10-26 813-688 0–9 XXXall 10 · 3 holders which blocks → INVOXIO INCORPORATED 158H TAMPAEST FL
2018-10-26 916-518 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM NORTH CA
2018-10-25 432-444 0–9 XXXall 10 · 4 holders which blocks → USFON, INC. - TX 473F ODESSA TX
2018-10-25 438-355 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-10-25 438-356 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-10-25 458-300 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H HERMISTON OR
2018-10-25 458-400 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → INVOXIO INCORPORATED 158H CULVER OR
2018-10-25 458-900 0XXX1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → INVOXIO INCORPORATED 158H ATHENA OR
2018-10-25 516-916 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J NASSAUZN01 NY
2018-10-25 607-312 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → AIRUS, INC. - NY 363H BINGHAMTON NY
2018-10-25 639-382 not yet reported which blocks → Bell Mobility 6574 Regina —
2018-10-25 641-401 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - IA 221F SWALEDALE IA
2018-10-25 641-406 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - IA 221F MESERVEY IA
2018-10-25 641-614 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - IA 221F SHARPSBURG IA
2018-10-25 641-646 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - IA 221F ROWAN IA
2018-10-25 641-671 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IA 221F LENOX IA
2018-10-25 641-681 2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - IA 221F GOODELL IA
2018-10-25 681-240 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F SHEPHEDSTN WV
2018-10-25 681-246 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F INWOOD WV
2018-10-25 681-248 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F MARTINSBG WV
2018-10-25 737-251 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F BURNET TX
2018-10-25 737-252 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F LIBERTY HL TX
2018-10-25 807-358 not yet reported which blocks → Bell Mobility 6574 Thunder Bay —
2018-10-25 813-722 0–9 XXXall 10 · 3 holders which blocks → INVOXIO INCORPORATED 158H TAMPAWST FL
2018-10-25 813-733 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H TAMPANTH FL
2018-10-25 838-202 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2018-10-25 863-366 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H POINCIANA FL

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.