NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-09-28 350-200 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LODI CA
2022-09-28 350-250 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C TRACY CA
2022-09-28 352-935 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E GROVELAND FL
2022-09-28 361-361 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C BISHOP TX
2022-09-28 409-409 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C FANNETT TX
2022-09-28 448-210 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHIPLEY FL
2022-09-28 612-489 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E TWINCITIES MN
2022-09-28 662-662 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MS 719E MEMPHIS MS
2022-09-28 667-414 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2022-09-28 737-339 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F TAYLOR TX
2022-09-28 830-297 0XXX1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CARRIZOSPG TX
2022-09-28 830-369 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2022-09-28 830-830 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C DEL RIO TX
2022-09-28 854-585 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BLENHEIM SC
2022-09-28 940-940 0XXX1XXX2XXX3XXX8XXX9XXX which blocks → ONVOY, LLC - TX 903C AUBREY TX
2022-09-27 251-251 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - AL 604E JACKSON AL
2022-09-27 254-254 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C SALADO TX
2022-09-27 319-319 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IA 221F IOWA CITY IA
2022-09-27 337-337 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E LEESVILLE LA
2022-09-27 501-501 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AR 348F HOTSPRINGS AR
2022-09-27 504-504 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2022-09-27 509-509 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WA 483E YAKIMA WA
2022-09-27 562-562 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C NORWALK CA
2022-09-27 616-616 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2022-09-27 620-620 0–9 XXXwhole prefix which blocks → ONVOY, LLC - KS 205F HUTCHINSON KS
2022-09-27 650-650 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SAN MATEO CA
2022-09-27 731-731 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TN 525E DYERSBURG TN
2022-09-27 737-335 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SAN MARCOS TX
2022-09-27 782-907 not yet reported which blocks → Iristel Inc. 154E Annapolis Royal —
2022-09-27 782-910 not yet reported which blocks → Iristel Inc. 154E Chester —
2022-09-27 785-785 0–9 XXXwhole prefix which blocks → ONVOY, LLC - KS 205F COLBY KS
2022-09-27 806-806 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HEREFORD TX
2022-09-27 835-203 0XXX1XXX4XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BALLY PA
2022-09-27 839-221 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H COLUMBIA SC
2022-09-27 859-859 0–9 XXXwhole prefix which blocks → ONVOY, LLC - KY 896E BOONE KY
2022-09-27 864-524 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 SPARTANBG SC
2022-09-27 865-865 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TN 525E MARYVILLE TN
2022-09-27 873-631 not yet reported which blocks → TELUS Quebec 2243 Grenville —
2022-09-27 873-632 not yet reported which blocks → TELUS Quebec 2243 Quyon —
2022-09-27 912-229 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H SAVANNAH GA
2022-09-27 912-912 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D SAVANNAH GA
2022-09-27 925-925 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C CONCORD CA
2022-09-27 943-943 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D GAINESVL GA
2022-09-27 949-949 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C CAPITRNVLY CA
2022-09-27 951-951 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C CORONA CA
2022-09-27 952-952 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2022-09-27 971-438 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2022-09-26 212-212 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2022-09-26 219-219 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D WHEELER IN
2022-09-26 224-486 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.