NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2002-04-10 785-531 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 ELLSWORTH KS
2002-04-10 828-368 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VALDESE NC
2002-04-10 859-251 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 VERSAILLES KY
2002-04-10 859-274 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 MTSTERLING KY
2002-04-10 859-305 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 NICHOLASVL KY
2002-04-10 859-587 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 NOMIDDLETN KY
2002-04-10 859-605 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 HARRODSBG KY
2002-04-10 859-648 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 LITTLEROCK KY
2002-04-10 859-809 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 CORNISHVL KY
2002-04-10 902-980 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Chester —
2002-04-10 937-779 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WEST UNION OH
2002-04-10 985-227 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 THIBODAUX LA
2002-04-10 985-235 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NORCO LA
2002-04-10 985-240 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LULING LA
2002-04-10 985-241 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BOGALUSA LA
2002-04-10 985-242 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LOCKPORT LA
2002-04-09 208-881 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 IDAHOFALLS ID
2002-04-09 208-944 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 TWIN FALLS ID
2002-04-09 214-385 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCKINNEY TX
2002-04-09 270-246 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROWNSVL KY
2002-04-09 270-508 2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SMITHLAND KY
2002-04-09 270-562 1XXX4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BARDWELL KY
2002-04-09 270-589 2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEITCHFLD KY
2002-04-09 270-604 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKTON KY
2002-04-09 270-617 2XXX4XXX5XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HARDINSBG KY
2002-04-09 270-627 2XXX3XXX6XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FULTON KY
2002-04-09 270-952 6XXX7XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MORGANFLD KY
2002-04-09 337-308 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OPELOUSAS LA
2002-04-09 337-309 2XXX3XXX4XXX5XXX6XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2002-04-09 339-224 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MALDEN MA
2002-04-09 339-234 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BURLINGTON MA
2002-04-09 469-229 1XXX2XXX3XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
2002-04-09 484-205 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CENTER PT PA
2002-04-09 501-428 6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CONWAY AR
2002-04-09 502-718 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LOUISVILLE KY
2002-04-09 502-871 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 FRANKFORT KY
2002-04-09 513-331 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LEBANON OH
2002-04-09 520-223 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 NOGALES AZ
2002-04-09 520-226 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SIERRAVIST AZ
2002-04-09 580-736 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 DUNCAN OK
2002-04-09 580-756 1XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 MARLOW OK
2002-04-09 580-917 4XXX7XXX which blocks → T-MOBILE USA, INC. 6529 LAWTON OK
2002-04-09 631-767 none assigned yet which blocks → METROPCS, INC. 5562 BRENTWOOD NY
2002-04-09 636-232 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 FSSCRSTLCY MO
2002-04-09 636-234 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 UNION MO
2002-04-09 636-235 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 WARRENTON MO
2002-04-09 636-243 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 DE SOTO MO
2002-04-09 724-777 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALIQUIPPA PA
2002-04-09 828-376 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ARDEN NC
2002-04-09 843-337 0XXX1XXX2XXX3XXX4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHESTERFLD SC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.