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
2020-08-28 438-900 not yet reported which blocks → Iristel Inc. 154E Montreal —
2020-08-28 438-901 not yet reported which blocks → Iristel Inc. 154E Montreal —
2020-08-28 438-905 not yet reported which blocks → Iristel Inc. 154E Montreal —
2020-08-28 438-906 not yet reported which blocks → Iristel Inc. 154E Montreal —
2020-08-28 463-336 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H INDIANAPLS IN
2020-08-28 469-880 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2020-08-28 469-882 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2020-08-28 469-883 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2020-08-28 470-642 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2020-08-28 470-647 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 GAINESVL GA
2020-08-28 470-909 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2020-08-28 506-436 not yet reported which blocks → Iristel Inc. 154E Bouctouche —
2020-08-28 561-298 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2020-08-28 561-524 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2020-08-28 561-525 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2020-08-28 606-442 0XXX1XXX3XXX4XXX8XXX · 4 holders which blocks → NUSO, LLC 478J JELLICO KY
2020-08-28 620-406 0XXX1XXX2XXX3XXX · 3 holders which blocks → NUSO, LLC 478J TREECE KS
2020-08-28 650-540 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SSNFRNCSCO CA
2020-08-28 672-202 not yet reported which blocks → Iristel Inc. 154E Cache Creek —
2020-08-28 701-979 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 478J BISMARCK ND
2020-08-28 709-300 not yet reported which blocks → Iristel Inc. 154E Bonavista —
2020-08-28 727-358 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEARWATER FL
2020-08-28 727-370 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEARWATER FL
2020-08-28 772-243 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 PTST LUCIE FL
2020-08-28 782-302 not yet reported which blocks → Iristel Inc. 154E Barrington —
2020-08-28 786-407 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORTH DADE FL
2020-08-28 813-647 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2020-08-28 813-648 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPAEST FL
2020-08-28 825-465 not yet reported which blocks → Iristel Inc. 154E Anzac —
2020-08-28 854-213 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 BEAUFORT SC
2020-08-28 859-365 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J ALEXANDRIA KY
2020-08-28 872-895 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CHICGOZN01 IL
2020-08-28 903-990 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BONHAM TX
2020-08-28 904-649 0–9 XXXwhole prefix which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 FERNADNBCH FL
2020-08-28 910-492 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 478J LONG BEACH NC
2020-08-28 930-216 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHARLESTN IN
2020-08-28 956-558 0–9 XXXall 10 · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
2020-08-27 208-517 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J COTTONWOOD ID
2020-08-27 209-693 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LODI CA
2020-08-27 224-335 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J ANTIOCH IL
2020-08-27 226-756 not yet reported which blocks → Iristel Inc. 154E Listowel —
2020-08-27 239-342 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J FORT MYERS FL
2020-08-27 240-574 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRIENDSVL MD
2020-08-27 252-691 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J KNOTTS IS NC
2020-08-27 360-634 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2020-08-27 365-725 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2020-08-27 365-735 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2020-08-27 414-786 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MILWAUKZN4 WI
2020-08-27 414-946 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H MILWAUKZN5 WI
2020-08-27 425-371 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOTHELL WA

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.