| 21101 | Nfcda Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Dec 2025 |
| 21102 | NFR Bear Paw Basin, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2013 |
| 21103 | NFR Energy, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2017 |
| 21104 | NGC Energy Company | | Oil & Gas Operator | May 1989 |
| 21105 | Ngezi, LCC | Fort Worth, TX 76111 | Oil & Gas Operator | Feb 2026 |
| 21106 | NGL Processing, LLC | | Oil Operator | Jun 2000 |
| 21107 | NGM Noble LTD | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 21108 | Ngo Development Corp. | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 21109 | NGX Company | Roswell, NM 88202 | Oil & Gas Operator | Jul 2008 |
| 21110 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 21111 | NHRG Inc | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 21112 | NHS Petroleum & Investments LTD. | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1996 |
| 21113 | Nicco Operating Co. | | Oil & Gas Operator | May 1990 |
| 21114 | Niche Energy LLC | Waterford, PA 16441-9125 | Gas Operator | Dec 2025 |
| 21115 | Nicholas Water Service, Inc. | Zenda, KS 67159 | Oil Operator | Mar 2006 |
| 21116 | Nichols Brothers | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 21117 | Nichols Fluid Service, Inc. | Liberal, KS 67901 | Oil Operator | Jun 2019 |
| 21118 | Nichols Oil & Gas Corporation | Shreveport, LA 71135 | Oil & Gas Operator | Aug 2003 |
| 21119 | Nichols Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 21120 | Nichols Oil Corp. | Holcomb, KS 67846 | Oil Operator | Dec 1994 |
| 21121 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 21122 | Nichols Water Service Inc | Forgan, OK 73938 | Oil & Gas Operator | May 2018 |
| 21123 | Nichols, Carl E. | Azle, TX 76098 | Oil & Gas Operator | Aug 2004 |
| 21124 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 21125 | Nichols, John Wesley | Little Elm, TX 75068 | Oil & Gas Operator | Jul 2011 |
| 21126 | Nichols, Manford, A General Partnership | Sublette, KS 67877 | Gas Operator | Aug 2025 |
| 21127 | Nichols,Edwin S Explorations Inc | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 21128 | Nick Oil | Abilene, TX 79601 | Oil & Gas Operator | Feb 2026 |
| 21129 | Nickell & Son Oil & Salvage | Parker, KS 66072 | Oil Operator | Aug 2006 |
| 21130 | Nickell Drilling | | Oil Operator | Jun 2010 |
| 21131 | Nickell Oil Company | Walters, OK 73572 | Oil Operator | Apr 2018 |
| 21132 | Nickerson, Royal | Clymer, NY 14724 | Gas Operator | Dec 2024 |
| 21133 | Nicki T Oil & Gas LLC | Midland, TX 79711 | Oil Operator | Feb 2026 |
| 21134 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 21135 | Nicklos Oil & Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1986 |
| 21136 | Nicolaysen G G Jr | | Oil & Gas Operator | Dec 1995 |
| 21137 | Nicor Exploration | | Oil Operator | Jul 1993 |
| 21138 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 21139 | Nicor Production Company | Houston, TX 77002 | Oil & Gas Operator | May 1993 |
| 21140 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 21141 | Niedorf, Patrick Stephen | San Antonio, TX 78239 | Oil Operator | Jul 2001 |
| 21142 | Niefergold, Martin & Suzanne | Lawtons, NY 14091 | Gas Operator | Dec 2024 |
| 21143 | Niehage Oil Company, LLC | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 21144 | Nielco, Inc. | Billings, MT 59103 | Oil & Gas Operator | Apr 2002 |
| 21145 | Nielson & Associates, Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 21146 | Nielson Capital Partners LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2014 |
| 21147 | Nielson Enterpri | | Oil & Gas Operator | Sep 1987 |
| 21148 | Nieset Lawrence & Christopher | Helena, OH 43435 | Oil Operator | Dec 2024 |
| 21149 | Night Owl Well Service | Cairo, WV 26337-0000 | Oil & Gas Operator | Dec 2021 |
| 21150 | Nightengale Henr | | Gas Operator | Nov 1996 |
| 21151 | Nighthawk Production LLC | | Oil & Gas Operator | May 2016 |
| 21152 | Nijean, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2012 |
| 21153 | Nimrod Petroleum Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Dec 2002 |
| 21154 | Nine Point Energy, LLC | | Oil & Gas Operator | Oct 2021 |
| 21155 | Nineveh Corp. | Dallas, TX 75208 | Oil & Gas Operator | Feb 2026 |
| 21156 | Niobrara Illuminating Gas Associates LLC | | Oil & Gas Operator | Jul 2007 |
| 21157 | Nip-N-Tuck Minerals, Inc. | | Gas Operator | Feb 1988 |
| 21158 | Nippon Oil Exploration USA LTD | | Oil & Gas Operator | Dec 2010 |
| 21159 | Nisrol, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2018 |
| 21160 | Nitcher, Benton L. | Wellsville, KS 66092 | Oil & Gas Operator | Dec 1995 |
| 21161 | Nitro Energy, Inc. | | Gas Operator | Dec 2005 |
| 21162 | Nitro Oil & Gas, LLC | Cuero, TX 77954 | Oil & Gas Operator | Feb 2026 |
| 21163 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 21164 | Nitro-Lift/Oklahoma Manufacturing LLC | Tishomingo, OK 73460-0235 | Oil Operator | Feb 2026 |
| 21165 | Nitschke, Dan E. | Henrietta, TX 76365 | Oil & Gas Operator | Feb 2026 |
| 21166 | Nivens Productions LLC | Coyle, OK 73027-9785 | Oil & Gas Operator | Aug 2024 |
| 21167 | Nix, Tommy | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 21168 | Nixon Properties Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2023 |
| 21169 | Nixon R P Operat | | Oil Operator | Aug 1995 |
| 21170 | Nizen, Stanley | FT Stockton, TX 79735 | Oil & Gas Operator | May 2002 |
| 21171 | Nja Operating LLC | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 21172 | Nject Disposal LLC | Houston, TX 77027 | Oil Operator | Mar 2017 |
| 21173 | NJL Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Feb 2007 |
| 21174 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 21175 | NKC Energy, LLC | Bruceville, TX 76630 | Oil Operator | Feb 2026 |
| 21176 | NLC Newstead Holdings LLC | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 21177 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 21178 | NMR Energy LLC | Houston, TX 77063 | Oil & Gas Operator | Feb 2026 |
| 21179 | NMT Oil Company Inc. | | Oil & Gas Operator | Dec 2025 |
| 21180 | Nnogc Exploration & Production, LLC | Window Rock, AZ 86515 | Oil & Gas Operator | Dec 2025 |
| 21181 | Noah, Calvin | Valley Center, KS 67147 | Oil Operator | Oct 2010 |
| 21182 | Noarko Resources | | Oil & Gas Operator | Mar 1990 |
| 21183 | Nobbs, Gary H. And Bosinski, Kathy | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 21184 | Nobel Petroleum USA Inc. | League City, TX 77573 | Oil Operator | Feb 2026 |
| 21185 | Noble & Cantrell Expl. Co., Inc. | Winnsboro, TX 75494 | Oil & Gas Operator | Aug 2006 |
| 21186 | Noble Drilling Corp Expl Div | Houston, TX 77042 | Oil & Gas Operator | Feb 1992 |
| 21187 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 21188 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Feb 2026 |
| 21189 | Noble Exploration, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2003 |
| 21190 | Noble Gas Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 1997 |
| 21191 | Noble Oil Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1996 |
| 21192 | Noble Operating Company Inc | Garden City, KS 67846 | Oil & Gas Operator | Sep 2014 |
| 21193 | Noble Operating, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Sep 2013 |
| 21194 | Noble Petroleum LLC | Lower Salem, OH 45745-9648 | Oil & Gas Operator | Dec 2024 |
| 21195 | Noble Petroleum, Inc. | Wichita, KS 67205 | Oil Operator | Sep 2013 |
| 21196 | Noble Producing Company Inc. | Dallas, TX 75244 | Oil & Gas Operator | Mar 1996 |
| 21197 | Noble Resources Inc | Mannford, OK 74044 | Oil & Gas Operator | Dec 2025 |
| 21198 | Noble, Alton L | Westfield, NY 14787 | Gas Operator | Dec 2024 |
| 21199 | Nobleson Operating, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Jun 1996 |
| 21200 | Noc | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2020 |