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
2019-04-23 561-464 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2019-04-23 910-926 0XXX1XXX2XXX6XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 ROSEBORO NC
2019-04-23 915-221 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F VINTON TX
2019-04-23 951-799 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J HEMT ANZA CA
2019-04-23 980-399 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E HUNTERSVL NC
2019-04-22 206-688 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2019-04-22 225-431 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GALVEZ LA
2019-04-22 320-419 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TEKSTAR COMMUNICATIONS, INC. 4156 WILLMAR MN
2019-04-22 517-928 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MASON MI
2019-04-22 608-716 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2019-04-22 616-286 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2019-04-22 657-380 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-04-22 657-419 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2019-04-22 989-353 0XXX3XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CHESTER MI
2019-04-19 231-763 0XXX8XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K AMBLE MI
2019-04-19 352-647 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 GAINESVL FL
2019-04-19 430-256 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F CADDOMILLS TX
2019-04-19 646-990 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2019-04-19 669-289 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CAMPBELL CA
2019-04-19 810-271 0XXX2XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LENNON MI
2019-04-19 845-717 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WARWICK NY
2019-04-19 931-597 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F LEWISBURG TN
2019-04-18 315-981 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E OSCEOLA NY
2019-04-18 320-415 0XXX2XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MELROSE MN
2019-04-18 431-212 not yet reported which blocks → LES.NET (1996) Inc. 141F Neepawa —
2019-04-18 520-493 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 TUCSON AZ
2019-04-18 608-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H MADISON WI
2019-04-18 615-637 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F SCUNNINGHA TN
2019-04-18 657-660 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SANTA ANA CA
2019-04-18 680-219 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E UTICA NY
2019-04-18 715-883 0–9 XXXall 10 · 5 holders which blocks → TDS METROCOM, LLC 520K STEVENS PT WI
2019-04-18 720-617 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J DENVER CO
2019-04-18 808-466 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2019-04-18 814-318 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F HASTINGS PA
2019-04-18 920-930 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H GREEN BAY WI
2019-04-18 940-289 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F TIOGA TX
2019-04-17 236-967 not yet reported which blocks → TELUS Mobility 646F Vancouver —
2019-04-17 253-325 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2019-04-17 346-386 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SPRING TX
2019-04-17 437-340 not yet reported which blocks → TELUS Mobility 646F Toronto —
2019-04-17 438-941 not yet reported which blocks → TELUS Mobility 646F Montreal —
2019-04-17 510-961 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2019-04-17 782-775 not yet reported which blocks → TELUS Mobility 646F Halifax —
2019-04-17 808-437 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2019-04-17 825-986 not yet reported which blocks → TELUS Mobility 646F Calgary —
2019-04-17 912-413 0–9 XXXall 10 · 2 holders which blocks → CORETEL GEORGIA, INC. - GA 052G STATESBORO GA
2019-04-17 929-517 0–9 XXXall 10 · 4 holders which blocks → INTRADO COMMUNICATIONS, LLC 831C NWYRCYZN06 NY
2019-04-16 206-806 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J SEATTLE WA
2019-04-16 267-637 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2019-04-16 470-479 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA NE GA

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.