NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 918
SOUTHWESTERN BELL 236
NEW CINGULAR WIRELESS PCS, LLC - IL 93
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 50
T-MOBILE USA, INC. 49
VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 36
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
2025-03-10 918-222 0–9 XXXwhole prefix which blocks → UNITED STATES CELLULAR - OK 6272 TULSA OK
2024-12-27 918-870 0XXX1XXX2XXX7XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H JENKS OK
2024-10-30 918-620 0XXX which blocks → RINGER MOBILE, INC. 781K DEWEY OK
2024-03-18 918-580 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 BARTLESVL OK
2023-12-20 918-918 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OK 409F BROKENARRW OK
2023-10-25 918-572 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALBION OK
2023-09-28 918-539 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MUSKOGEE OK
2023-08-01 918-880 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 JENKS OK
2023-05-31 918-405 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SPERRY OK
2020-08-12 918-882 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2019-04-15 918-883 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
2018-09-13 918-727 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2018-06-21 918-792 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 RED OAK OK
2016-07-19 918-972 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEWEY OK
2016-03-14 918-890 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F DRUMRIGHT OK
2016-02-12 918-956 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H CLEVELAND OK
2015-10-20 918-974 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 POTEAU OK
2015-10-19 918-941 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 KELLYVILLE OK
2015-09-18 918-900 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2015-08-13 918-600 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2015-04-23 918-973 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
2014-08-25 918-998 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H TULSA OK
2013-11-26 918-997 not yet reported which blocks → BTC BROADBAND, INC. 669B MUSKOGEE OK
2013-11-01 918-910 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K MUSKOGEE OK
2013-08-14 918-400 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OK 409F FORTGIBSON OK
2013-05-22 918-414 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TAHLEQUAH OK
2013-03-18 918-954 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G TULSA OK
2012-10-11 918-980 not yet reported which blocks → CROSS WIRELESS, L.L.C. 148G HARTSHORNE OK
2012-09-28 918-981 0–9 XXXall 10 · 7 holders which blocks → UNITED STATES CELLULAR - OK 6272 PRYOR OK
2012-07-13 918-986 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J TULSA OK
2012-07-03 918-416 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK 7632 CATOOSA OK
2012-06-19 918-984 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TULSA OK
2012-06-15 918-921 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TULSA OK
2012-06-11 918-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2012-06-11 918-863 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2012-06-11 918-871 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2012-05-15 918-780 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-05-15 918-901 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-05-10 918-345 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 CATOOSA OK
2012-05-10 918-417 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 JENKS OK
2012-05-10 918-679 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 CLAREMORE OK
2012-05-10 918-701 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 JENKS OK
2012-05-10 918-800 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 CATOOSA OK
2012-05-10 918-965 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 CLAREMORE OK
2012-03-26 918-206 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-14 918-370 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-404 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-500 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-568 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-703 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.