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
2020-12-14 774-448 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILFORD MA
2020-12-14 864-690 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 EASLEY SC
2020-12-14 939-369 0XXX2XXX3XXX9XXX · 4 holders which blocks → NEUTRAL TANDEM - PR 559F AGUADA PR
2020-12-14 939-739 0–9 XXXall 10 · 5 holders which blocks → NEUTRAL TANDEM - PR 559F TOA ALTA PR
2020-12-14 949-620 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C IRVINE CA
2020-12-11 213-495 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2020-12-11 224-368 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2020-12-11 272-251 1XXX2XXX3XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J LAPORTE PA
2020-12-11 305-317 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2020-12-11 310-290 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2020-12-11 321-335 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2020-12-11 480-841 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2020-12-11 510-831 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2020-12-11 548-249 not yet reported which blocks → Fibernetics Corporation 464D Belle River —
2020-12-11 551-294 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F RAMSEY NJ
2020-12-11 715-961 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HUDSON WI
2020-12-11 720-796 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J GEORGETOWN CO
2020-12-11 727-699 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HUDSON FL
2020-12-11 754-336 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CORAL SPG FL
2020-12-11 772-244 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 SEBASTIAN FL
2020-12-11 813-608 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PLANT CITY FL
2020-12-11 862-353 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWARK NJ
2020-12-11 873-699 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Victoriaville —
2020-12-11 873-779 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Victoriaville —
2020-12-11 873-799 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Victoriaville —
2020-12-11 873-977 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Victoriaville —
2020-12-11 904-799 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H FERNADNBCH FL
2020-12-11 910-825 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2020-12-11 934-284 0–9 XXXall 10 · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 LINDENHST NY
2020-12-11 941-899 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SARASOTA FL
2020-12-11 984-264 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E GOLDSBORO NC
2020-12-10 305-413 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C KEYS FL
2020-12-10 332-240 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2020-12-10 405-913 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 MOORE OK
2020-12-10 470-738 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2020-12-10 480-742 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-10 484-790 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W CHESTER PA
2020-12-10 510-641 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2020-12-10 623-272 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-10 657-656 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C ANAHEIM CA
2020-12-10 660-662 0XXX2XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MO 093F HIGBEE MO
2020-12-10 660-898 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLINTON MO
2020-12-10 689-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ORLANDO FL
2020-12-10 779-326 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J DWIGHT IL
2020-12-10 839-432 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - SC 548E CAMDEN SC
2020-12-10 839-854 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E ORANGEBURG SC
2020-12-10 873-755 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Maniwaki —
2020-12-10 873-775 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Maniwaki —
2020-12-10 873-776 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Maniwaki —
2020-12-10 873-933 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Maniwaki —

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.