NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-01-04 657-649 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2023-01-04 657-651 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-01-04 682-413 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLEBURNE TX
2023-01-04 771-220 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - DC 074F WSHNGTNZN1 DC
2023-01-04 807-513 not yet reported which blocks → Bell Mobility 6574 Kenora —
2023-01-04 835-210 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2023-01-04 925-507 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2023-01-04 941-318 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 ENGLEWOOD FL
2023-01-04 954-872 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FTLAUDERDL FL
2023-01-03 219-329 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 VALPARAISO IN
2023-01-03 229-510 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 MOULTRIE GA
2023-01-03 236-783 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2023-01-03 308-200 0XXX1XXX2XXX3XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 MCCOOK NE
2023-01-03 308-205 0XXX1XXX2XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 ELWOOD NE
2023-01-03 346-620 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICHMNRNBG TX
2023-01-03 346-623 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SATSUMA TX
2023-01-03 365-436 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2023-01-03 412-286 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2023-01-03 445-270 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2023-01-03 472-207 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2023-01-03 531-307 1XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 HOMER NE
2023-01-03 531-314 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 W HAMBURG NE
2023-01-03 779-361 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 KANKAKEE IL
2023-01-03 782-497 not yet reported which blocks → Bell Mobility Aliant 329A Sydney —
2023-01-03 807-396 not yet reported which blocks → Bell Mobility 6574 Kenora —
2023-01-03 825-546 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2023-01-03 839-230 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWBERRY SC
2023-01-03 839-231 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ORANGEBURG SC
2023-01-03 943-212 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2023-01-03 943-213 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2023-01-03 945-284 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2023-01-03 956-692 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION TX
2022-12-30 240-975 0XXX1XXX5XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2022-12-30 425-461 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AMES LAKE WA
2022-12-30 472-206 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSONVL NC
2022-12-30 651-396 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2022-12-30 769-296 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 LUCEDALE MS
2022-12-30 838-261 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
2022-12-30 870-272 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C TURRELL AR
2022-12-30 914-203 0XXX1XXX2XXX3XXX4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2022-12-30 939-354 0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J TRUJILLOAL PR
2022-12-29 346-662 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HUMBLE TX
2022-12-29 368-201 not yet reported which blocks → Bell Mobility 6574 Calgary —
2022-12-29 506-484 not yet reported which blocks → Bell Mobility Aliant 329A Moncton —
2022-12-29 561-905 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BELLEGLADE FL
2022-12-29 572-732 0XXX2XXX3XXX7XXX · 4 holders which blocks → ONVOY, LLC - OK 409F WYNNEWOOD OK
2022-12-29 572-742 0XXX1XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OK 409F MEEKER OK
2022-12-29 575-290 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALAMOGORDO NM
2022-12-29 629-396 0XXX1XXX3XXX5XXX9XXX · 3 holders which blocks → ONVOY, LLC - TN 525E HARTSVILLE TN
2022-12-29 672-373 not yet reported which blocks → Bell Mobility 6574 Abbotsford —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.