NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2021-10-20 225-350 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H JACKSON LA
2021-10-20 225-463 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ST GABRIEL LA
2021-10-20 225-464 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LIVINGSTON LA
2021-10-20 225-466 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H STFRNCISVL LA
2021-10-20 225-487 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H VACHERIE LA
2021-10-20 307-396 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2021-10-20 470-860 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ATLANTA GA
2021-10-20 551-332 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D BAYONNE NJ
2021-10-20 582-288 0–9 XXXall 10 · 7 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ST MARYS PA
2021-10-20 582-822 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ALTOONA PA
2021-10-20 582-855 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J JOHNSTOWN PA
2021-10-20 720-824 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D HUDSON CO
2021-10-20 912-419 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BRUNSWICK GA
2021-10-19 206-761 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMNDBCH WA
2021-10-19 224-437 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHEELING IL
2021-10-19 239-539 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C CAPE CORAL FL
2021-10-19 313-540 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D DETROITZN4 MI
2021-10-19 337-567 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2021-10-19 340-209 not yet reported which blocks → LIBERTY MOBILE USVI INC. 638J CHTAMSTTHS VI
2021-10-19 346-516 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2021-10-19 442-367 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CALEXICO CA
2021-10-19 470-890 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2021-10-19 507-860 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 WINONA MN
2021-10-19 572-204 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2021-10-19 579-356 not yet reported which blocks → 9164-3122 Quebec inc 843D Ste-Victoire —
2021-10-19 581-210 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Black Lake —
2021-10-19 581-413 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Leeds —
2021-10-19 581-414 not yet reported which blocks → IVIC Telecom s.e.n.c 817D East Broughton —
2021-10-19 581-415 not yet reported which blocks → IVIC Telecom s.e.n.c 817D St-Methode-de-Frontenac —
2021-10-19 581-416 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Tring Jonction —
2021-10-19 581-417 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Stratford —
2021-10-19 629-268 0XXX1XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F EAGLEVILLE TN
2021-10-19 660-280 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KIRKSVILLE MO
2021-10-19 779-339 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRANKFORT IL
2021-10-19 848-320 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DUNELLEN NJ
2021-10-19 863-315 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LAKELAND FL
2021-10-19 920-414 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WI 225C NEENAH WI
2021-10-19 920-534 0XXX1XXX2XXX8XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - WI 841H ABRAMS WI
2021-10-19 945-226 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RED OAK TX
2021-10-19 947-242 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C W BLOOMFLD MI
2021-10-18 470-864 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CEDARTOWN GA
2021-10-18 579-548 not yet reported which blocks → Cooptel 818D Sorel —
2021-10-18 681-391 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2021-10-18 681-410 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN2 WV
2021-10-18 737-306 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUTTO TX
2021-10-18 762-332 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 COLUMBUS GA
2021-10-18 825-907 not yet reported which blocks → Iristel Inc. 154E Fox Creek —
2021-10-18 838-262 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C TROY NY
2021-10-18 865-421 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MARYVILLE TN
2021-10-18 971-414 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STFRD-SNDY OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.