NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2020-12-16 939-779 0XXX3XXX7XXX9XXX · 4 holders which blocks → NEUTRAL TANDEM - PR 559F VILLALBA PR
2020-12-16 939-839 0XXX3XXX7XXX · 3 holders which blocks → NEUTRAL TANDEM - PR 559F YABUCOA PR
2020-12-16 949-624 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SADLBK VLY CA
2020-12-16 949-634 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SADLBK VLY CA
2020-12-16 951-564 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PERRIS CA
2020-12-16 951-568 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-12-16 951-573 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-12-16 971-389 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2020-12-15 334-851 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E MONTGOMERY AL
2020-12-15 367-288 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-15 367-388 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-15 562-534 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C LONG BEACH CA
2020-12-15 657-467 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C SANTA ANA CA
2020-12-15 707-871 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-12-15 719-402 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D COLORDOSPG CO
2020-12-15 743-465 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H KIMESVILLE NC
2020-12-15 864-495 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENWOOD SC
2020-12-15 908-430 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CHESTER NJ
2020-12-15 939-359 2XXX3XXX · 2 holders which blocks → NEUTRAL TANDEM - PR 559F MOCA PR
2020-12-15 939-569 0XXX2XXX5XXX · 3 holders which blocks → NEUTRAL TANDEM - PR 559F OROCOVIS PR
2020-12-15 939-629 2XXX6XXX · 2 holders which blocks → NEUTRAL TANDEM - PR 559F SANTANA PR
2020-12-14 202-977 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2020-12-14 202-979 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2020-12-14 202-980 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G WSHNGTNZN1 DC
2020-12-14 217-969 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 LITCHFIELD IL
2020-12-14 279-207 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ELK GROVE CA
2020-12-14 334-769 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOTHAN AL
2020-12-14 507-761 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2020-12-14 507-769 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2020-12-14 516-748 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN09 NY
2020-12-14 564-204 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-12-14 567-887 2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FREMONT OH
2020-12-14 619-859 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA MESA CA
2020-12-14 651-381 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D HASTINGS MN
2020-12-14 657-463 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2020-12-14 669-609 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C CAMPBELL CA
2020-12-14 765-550 0XXX2XXX5XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BROOKSTON IN
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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.