NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 918-868 none assigned yet which blocks → SALINA-SPAVINAW TEL. CO. 2022 KANSAS OK
— 918-874 0XXX which blocks → WINDSTREAM OKLAHOMA, INC. 1965 WARDVILLE OK
— 918-875 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 MOFFETT OK
— 918-877 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 TULSA OK
— 918-878 7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TULSA OK
— 918-879 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 TULSA OK
— 918-885 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 HOMINY OK
— 918-888 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CATOOSA OK
— 918-893 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BROKENARRW OK
— 918-897 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F HOMINY OK
— 918-898 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
— 918-902 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 918-922 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J TULSA OK
— 918-923 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CLAREMORE OK
— 918-925 2XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-928 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
— 918-929 not yet reported which blocks → CRAW-KAN TEL. COOP.,INC. - KS 1818 SOUTH EDNA OK
— 918-932 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
— 918-938 0–9 XXXall 10 · 6 holders which blocks → BTC BROADBAND, INC. 669B TULSA OK
— 918-939 6XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-940 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BROKENARRW OK
— 918-943 0XXX1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BIXBY OK
— 918-945 not yet reported which blocks → CROSS TEL. CO. 1985 MCCURTAIN OK
— 918-947 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J TULSA OK
— 918-949 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J TULSA OK
— 918-950 not yet reported which blocks → OK
— 918-951 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-952 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
— 918-955 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-957 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J BROKENARRW OK
— 918-958 not yet reported which blocks → OK
— 918-959 not yet reported which blocks → OK
— 918-962 0XXX4XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 SPIRO OK
— 918-963 not yet reported which blocks → LAVACA TEL CO 1704 PANAMA OK
— 918-966 not yet reported which blocks → CROSS TEL. CO. 1985 KEOTA OK
— 918-967 0XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 STIGLER OK
— 918-968 6XXX8XXX which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 STROUD OK
— 918-969 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BOKOSHE OK
— 918-970 0XXX2XXX4XXX6XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BIXBY OK
— 918-971 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-976 not yet reported which blocks → OK
— 918-977 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 BARTLESVL OK
— 918-985 not yet reported which blocks → SENECA TEL. CO. 1945 TIFF CITY OK
— 918-988 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
— 918-989 not yet reported which blocks → CROSS TEL. CO. 1985 KEEFETON OK
— 918-992 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TULSA OK
— 918-996 not yet reported which blocks → CRAW-KAN TEL. COOP.,INC. - KS 1818 SOBARTLETT OK
— 918-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F TULSA OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.