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
2020-05-19 747-293 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D CANOGAPARK CA
2020-05-19 929-545 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2020-05-19 949-210 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D SADLBK VLY CA
2020-05-18 208-370 0–9 XXXall 10 · 6 holders which blocks → CTC TELECOM, INC. 4032 BOISE ID
2020-05-18 272-243 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F ORWIGSBURG PA
2020-05-18 480-691 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-05-18 540-730 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H KEEZLETOWN VA
2020-05-18 571-517 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E DULLES VA
2020-05-18 763-330 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E TWINCITIES MN
2020-05-18 785-306 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 ST FRANCIS KS
2020-05-18 810-246 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAPEER MI
2020-05-18 872-264 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2020-05-18 910-761 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E WRGHTSVBCH NC
2020-05-15 202-972 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2020-05-15 217-860 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHATHAM IL
2020-05-15 469-827 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 FRISCO TX
2020-05-15 469-829 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K PLANO TX
2020-05-15 516-842 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D NASSAUZN06 NY
2020-05-15 516-862 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D NASSAUZN08 NY
2020-05-15 516-878 0–9 XXXall 10 · 8 holders which blocks → VONAGE AMERICA LLC 197D NASSAUZN07 NY
2020-05-15 651-377 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 TWINCITIES MN
2020-05-15 651-515 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TWINCITIES MN
2020-05-15 774-544 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D WEBSTER MA
2020-05-15 848-301 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C HOLMDEL NJ
2020-05-15 848-849 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C FARMINGDL NJ
2020-05-15 856-326 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C BRIDGETON NJ
2020-05-15 857-567 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - MA 892D DORCHESTER MA
2020-05-15 862-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C PASSAIC NJ
2020-05-15 929-542 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D NWYRCYZN15 NY
2020-05-15 929-558 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D NWYRCYZN10 NY
2020-05-15 929-560 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D NWYRCYZN14 NY
2020-05-15 929-565 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D NWYRCYZN05 NY
2020-05-14 254-465 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LORENA TX
2020-05-14 254-766 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WORTHAM TX
2020-05-14 254-788 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LEROY TX
2020-05-14 254-877 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H GHOLSON TX
2020-05-14 312-682 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J CHICGOZN01 IL
2020-05-14 365-324 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2020-05-14 424-446 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BEVERLYHLS CA
2020-05-14 438-473 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-05-14 438-474 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-05-14 438-945 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2020-05-14 438-946 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2020-05-14 484-561 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2020-05-14 548-522 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Elora —
2020-05-14 571-475 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D BRADDOCK VA
2020-05-14 608-529 1XXX2XXX3XXX7XXX9XXX · 4 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F CUBA CITY WI
2020-05-14 608-681 1XXX which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F VIOLA WI
2020-05-14 631-720 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BRENTWOOD NY
2020-05-14 636-319 0–9 XXXall 10 · 6 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 DARDENNE MO

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.