NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
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
2016-03-07 639-539 not yet reported which blocks → Bell Mobility 6574 Kindersley —
2016-03-07 639-540 not yet reported which blocks → Bell Mobility 6574 Yorkton —
2016-03-07 639-541 not yet reported which blocks → Bell Mobility 6574 Swift Current —
2016-03-07 657-303 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2016-03-07 657-304 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTA ANA CA
2016-03-07 708-892 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C CRETE IL
2016-03-07 709-705 not yet reported which blocks → Iristel Inc. 154E St. John's —
2016-03-07 731-248 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TN 525E GIBSON TN
2016-03-07 737-781 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2016-03-07 778-572 not yet reported which blocks → TELUS 8086 Haney —
2016-03-07 845-299 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CATSKILLS COMMUNICATIONS, INC - NY 360H LIVISTNMNR NY
2016-03-07 850-781 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PACE FL
2016-03-07 865-737 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TN 525E NORRIS TN
2016-03-07 865-830 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TN 525E SOLWAY TN
2016-03-07 873-738 not yet reported which blocks → Iristel Inc. 154E Buckingham —
2016-03-07 909-403 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C RUNNINGSPG CA
2016-03-07 949-408 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IRVINE CA
2016-03-07 989-267 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C ST HELEN MI
2016-03-04 269-237 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLCV - MI 543C THREE OAKS MI
2016-03-04 405-407 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F NOBLE OK
2016-03-04 458-219 0–9 XXXall 10 · 7 holders which blocks → UNITED STATES CELLULAR - OR 6349 HERMISTON OR
2016-03-04 470-287 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D CLERMONT GA
2016-03-04 470-786 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ATLANTA GA
2016-03-04 562-269 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LONG BEACH CA
2016-03-04 573-713 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - MO 093F FARMINGTON MO
2016-03-04 587-854 not yet reported which blocks → Iristel Inc. 154E Stettler —
2016-03-04 616-737 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C SARANAC MI
2016-03-04 628-237 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SAUSALITO CA
2016-03-04 657-321 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ANA CA
2016-03-04 754-399 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C DEERFLDBCH FL
2016-03-04 816-491 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 KANSASCITY MO
2016-03-04 865-205 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E LOUDON TN
2016-03-04 951-405 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-03-03 240-758 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2016-03-03 269-371 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C BELLEVUE MI
2016-03-03 339-210 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - MA 892D SAUGUS MA
2016-03-03 339-215 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D LEXINGTON MA
2016-03-03 346-233 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C BAYTOWN TX
2016-03-03 346-368 0–9 XXXall 10 · 5 holders which blocks → ETS TELEPHONE COMPANY, INC. 2091 SUGAR LAND TX
2016-03-03 405-877 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F GUTHRIE OK
2016-03-03 505-587 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LAS VEGAS NM
2016-03-03 530-317 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C PLVL WEST CA
2016-03-03 616-580 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C DORR MI
2016-03-03 616-779 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C GRATTAN MI
2016-03-03 707-210 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C SONOMA CA
2016-03-03 717-276 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E ANNVILLE PA
2016-03-03 717-297 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - PA 547E MT GRETNA PA
2016-03-03 719-917 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CO 026D LEADVILLE CO
2016-03-03 747-273 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GLENDALE CA
2016-03-03 782-339 not yet reported which blocks → TELUS Integrated Communications 2782 Liverpool —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.