NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 26
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
2004-01-23 304-939 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 HNTNGTNZN1 WV
2004-01-23 701-350 3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEVILSLAKE ND
2004-01-22 575-825 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 PORTALES NM
2004-01-22 808-620 0–9 XXXall 10 · 2 holders which blocks → SANDWICH ISLES COMMUNICATIONS, INC. 3021 HONOLULU HI
2004-01-22 830-986 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F BLANCO TX
2004-01-21 318-584 6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2004-01-21 320-321 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MN 184D MONTEVIDEO MN
2004-01-21 417-651 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 GAINESVL MO
2004-01-21 417-896 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CASSVILLE MO
2004-01-21 630-392 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NAPERVILLE IL
2004-01-20 254-246 4XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BRECKENRDG TX
2004-01-20 281-231 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 WESTFIELD TX
2004-01-20 443-225 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 CAMBRIDGE MD
2004-01-20 443-239 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EASTON MD
2004-01-20 843-933 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HEMINGWAY SC
2004-01-20 847-613 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HALF DAY IL
2004-01-20 970-750 not yet reported which blocks → UNION TELEPHONE COMPANY 013B WALDEN CO
2004-01-20 970-755 not yet reported which blocks → UNION TELEPHONE COMPANY 013B RANGELY CO
2004-01-20 970-757 not yet reported which blocks → UNION TELEPHONE COMPANY 013B HAYDEN CO
2004-01-20 970-758 not yet reported which blocks → UNION TELEPHONE COMPANY 013B FRASER CO
2004-01-19 251-207 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BELLEFONTN AL
2004-01-19 269-223 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BATTLE CRK MI
2004-01-19 307-286 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2004-01-19 319-215 0–9 XXXall 10 · 3 holders which blocks → UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-01-19 320-337 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MN 184D ATWATER MN
2004-01-19 334-424 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HOLTVILLE AL
2004-01-19 402-587 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 FAIRBURY NE
2004-01-19 409-622 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KIRBYVILLE TX
2004-01-19 479-216 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MENA AR
2004-01-19 778-371 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 8377 Vancouver —
2004-01-19 905-635 not yet reported which blocks → TELUS Integrated Communications 2782 Burlington —
2004-01-16 229-338 0–9 XXXall 10 · 5 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 ALBANY GA
2004-01-16 254-215 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 TEMPLE TX
2004-01-16 317-362 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J INDIANAPLS IN
2004-01-16 386-277 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J DELEON SPG FL
2004-01-16 432-288 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 TERMINAL TX
2004-01-16 608-563 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K JANESVILLE WI
2004-01-16 715-544 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K STEVENS PT WI
2004-01-16 785-447 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 CLAYCENTER KS
2004-01-16 850-686 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PACE FL
2004-01-16 850-687 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DESTIN FL
2004-01-15 806-264 2XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEFLD TX
2004-01-15 863-899 4XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LAKELAND FL
2004-01-15 912-334 3XXX4XXX5XXX6XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 CLAXTON GA
2004-01-14 601-767 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2004-01-14 641-207 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LOCAL TELEPHONE DATA SERVICES CORP. 2842 KEOTA IA
2004-01-13 402-276 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 COLUMBUS NE
2004-01-13 484-266 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J W CHESTER PA
2004-01-13 770-892 0–9 XXXall 10 · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA SO GA
2004-01-13 806-523 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LEVELLAND TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.