NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 21
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
2021-03-19 361-901 0XXX2XXX3XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PORTLAVACA TX
2021-03-19 385-418 0–9 XXXall 10 · 3 holders which blocks → STRATUS NETWORKS 495J SALT LAKE UT
2021-03-19 386-901 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H LIVE OAK FL
2021-03-19 424-448 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2021-03-19 517-291 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → STRATUS NETWORKS 495J ADRIAN MI
2021-03-19 539-240 0–9 XXXall 10 · 2 holders which blocks → STRATUS NETWORKS 495J TULSA OK
2021-03-19 605-709 0–9 XXXall 10 · 3 holders which blocks → STRATUS NETWORKS 495J HARISBGTEA SD
2021-03-19 616-358 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J CEDAR SPG MI
2021-03-19 629-252 0–9 XXXall 10 · 6 holders which blocks → HADLO TECHNOLOGIES, LLC 436J FRANKLIN TN
2021-03-19 667-306 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2021-03-19 712-901 1XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ROCKWELLCY IA
2021-03-19 740-930 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CIRCLEVL OH
2021-03-19 743-224 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2021-03-19 779-902 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H DE KALB IL
2021-03-19 854-901 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H MYRTLE BCH SC
2021-03-19 901-593 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SOMERVILLE TN
2021-03-19 904-833 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C STARKE FL
2021-03-19 929-574 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J NWYRCYZN06 NY
2021-03-19 929-576 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J NWYRCYZN06 NY
2021-03-19 937-794 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PIQUA OH
2021-03-18 209-889 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2021-03-18 213-554 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-03-18 253-346 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-18 254-429 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J WACO TX
2021-03-18 309-870 0XXX1XXX2XXX3XXX · 4 holders which blocks → STRATUS NETWORKS 495J CROPSEY IL
2021-03-18 309-878 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → STRATUS NETWORKS 495J COOKSVILLE IL
2021-03-18 346-458 0–9 XXXall 10 · 6 holders which blocks → STRATUS NETWORKS 495J BEACH CITY TX
2021-03-18 352-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BROOKSVL FL
2021-03-18 386-667 3XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H JENNINGS FL
2021-03-18 409-264 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NDLDPTNCHS TX
2021-03-18 423-934 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SURGOINSVL TN
2021-03-18 432-306 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BIG SPRING TX
2021-03-18 432-667 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MARFA TX
2021-03-18 432-786 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WINK TX
2021-03-18 432-946 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H RANKIN TX
2021-03-18 447-445 0XXX1XXX2XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C INDIANOLA IL
2021-03-18 447-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C SPRINGFLD IL
2021-03-18 458-262 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
2021-03-18 469-938 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2021-03-18 469-940 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAXAHACHIE TX
2021-03-18 469-942 0–9 XXXall 10 · 2 holders which blocks → STRATUS NETWORKS 495J DALLAS TX
2021-03-18 629-251 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J MURFREESBO TN
2021-03-18 659-667 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AL 604E HALEYVILLE AL
2021-03-18 667-327 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D CAMBRIDGE MD
2021-03-18 667-337 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D CENTREVL MD
2021-03-18 667-347 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D FEDERALSBG MD
2021-03-18 667-357 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - MD 876D GREENSBORO MD
2021-03-18 667-376 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MD 876D OXFORD MD
2021-03-18 667-377 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - MD 876D ROCK HALL MD
2021-03-18 667-670 0XXX1XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - MD 876D SUDLERSVL MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.