| 20201 | N & O Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Dec 2025 |
| 20202 | N & P Enterprises | | Oil Operator | May 1997 |
| 20203 | N & W Enterprises, Inc. | Fort Scott, KS 66701 | Oil Operator | Jun 2025 |
| 20204 | N And B Exploration, Inc. | | Oil & Gas Operator | Jun 1993 |
| 20205 | N C B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 20206 | N Central Casing Pullers, Inc. | | Oil & Gas Operator | May 1994 |
| 20207 | N Dale Nichols | Midland, TX 79703 | Oil & Gas Operator | Jun 2004 |
| 20208 | N Eastern Oh O&G Exp Inc | Cleveland, OH 44106 | Oil & Gas Operator | Dec 1999 |
| 20209 | N H Wheless Oil Company | Shreveport, LA 71101 | Gas Operator | Sep 2002 |
| 20210 | N L S Inc | Kimberling City, MO 65686 | Oil & Gas Operator | Aug 2016 |
| 20211 | N S P Operating Group LLC | El Campo, TX 77437 | Oil & Gas Operator | Aug 2021 |
| 20212 | N-10 Exploration, LLC | Attica, KS 67009 | Oil & Gas Operator | Jun 2025 |
| 20213 | N-A Energy LLC | Arvada, CO 80005 | Oil Operator | Jun 2025 |
| 20214 | N-B Company Inco | | Oil & Gas Operator | Apr 1992 |
| 20215 | N. A. Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 2007 |
| 20216 | N. B. Hunt | | Oil & Gas Operator | May 1981 |
| 20217 | N. E. Loomis | | Oil Operator | Oct 1986 |
| 20218 | N. E. Operating Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2013 |
| 20219 | N. J. Pardue | | Oil & Gas Operator | Jul 1994 |
| 20220 | N. R. Price | | Oil & Gas Operator | Nov 1983 |
| 20221 | N. T. Rutledge Oil Co. | | Oil Operator | Jan 1989 |
| 20222 | N. W. Corporation | | Gas Operator | Jan 1989 |
| 20223 | N.F. Producers, Inc. | Berthoud, CO 80513 | Oil Operator | Jun 2025 |
| 20224 | Nabers, Lynn | Austin, TX 78751 | Gas Operator | Jul 2010 |
| 20225 | Nabob Production Company | Amarillo, TX 79105 | Gas Operator | Dec 1991 |
| 20226 | Nabors Drilling Company, Inc. | | Oil & Gas Operator | Sep 1977 |
| 20227 | Nabors Well Services LTD | Houston, TX 77067-4536 | Oil Operator | Apr 2011 |
| 20228 | Nabors-Johnson Prod Co., Inc. | | Oil & Gas Operator | Dec 2020 |
| 20229 | Nacatosh Gas Incorporated | | Oil & Gas Operator | Aug 2013 |
| 20230 | Naco Production | Midland, TX 79708 | Oil & Gas Operator | Aug 2003 |
| 20231 | Nacogdoches Oil & Gas Inc | Nacogdoches, TX 75963 | Oil & Gas Operator | Dec 2025 |
| 20232 | Nacogdoches Oil & Gas, LLC | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 2017 |
| 20233 | Nadcf Recovery Group, Inc. | Chapin, SC 29036 | Oil & Gas Operator | Dec 2025 |
| 20234 | Nadel & Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 20235 | Nadel & Gussman-Jetta Oper. Co. | | Oil & Gas Operator | Mar 2012 |
| 20236 | Nadel And Gussman Heyco, LLC | Roswell, NM 88202 | Oil & Gas Operator | Dec 2014 |
| 20237 | Nadel And Gussman LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 20238 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 20239 | Nadel And Gussman Rockies, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2012 |
| 20240 | Nadel And Gussman Ruston, LLC | | Oil & Gas Operator | Dec 2024 |
| 20241 | Nadk, LLC | Orem, UT 84097 | Oil & Gas Operator | Nov 2025 |
| 20242 | Nadsoilco LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Dec 2025 |
| 20243 | Nae, Inc. | Kerrville, TX 78028 | Oil Operator | Apr 2025 |
| 20244 | Naftex Operating Company | | Oil & Gas Operator | Oct 2025 |
| 20245 | Nagel, Arthur F. & Elaine L. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 20246 | Nahama & Weagant Energy Company | | Oil & Gas Operator | Dec 1997 |
| 20247 | Naifco Oil & Gas LLC | Oklahoma City, OK 73107 | Oil & Gas Operator | Oct 2025 |
| 20248 | Nail Stephen Dba Nail Oil & Gas | Maud, OK 74854 | Oil Operator | Aug 2025 |
| 20249 | Nails Operating Company LLC | Hondo, TX 78861 | Oil Operator | Dec 2025 |
| 20250 | Nairn, Robert | Elkhart, KS 67950 | Gas Operator | Apr 2011 |
| 20251 | Nall Oil & Gas | Mineral Wells, TX 76067 | Oil & Gas Operator | Dec 2025 |
| 20252 | Nally, Joseph L | Uniontown, KY 42461 | Oil & Gas Operator | Dec 2021 |
| 20253 | Nami Resources Company, LLC | | Oil & Gas Operator | Dec 2023 |
| 20254 | Nana Oil & Gas Inc. | | Oil & Gas Operator | Jan 2018 |
| 20255 | Nance Engineering Inc. | Houston, TX 77058 | Oil & Gas Operator | Mar 2002 |
| 20256 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 20257 | Nanco Resources, LLC | | Gas Operator | Dec 2021 |
| 20258 | Nancy Oil & Gas Corp | Tulsa, OK 74101 | Oil Operator | Apr 2020 |
| 20259 | Nancy Wilcox E Qualls | Farmington, NM 87410 | Gas Operator | May 2017 |
| 20260 | Nanke Energy LLC | Westminster, CO 80234 | Oil & Gas Operator | Oct 2025 |
| 20261 | Narbo Farms, LTD. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 20262 | Nard Inc | Buffalo, OK 73834-9737 | Oil Operator | Dec 2005 |
| 20263 | Naro Oil Corporation | Dallas, TX 75230-1986 | Oil & Gas Operator | Nov 2003 |
| 20264 | Nasco Petroleum L.L.C. | | Oil & Gas Operator | Sep 2025 |
| 20265 | Nash Oil & Gas, Inc. | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 20266 | Nashville Associates Inc | | Oil & Gas Operator | Dec 2003 |
| 20267 | Nassau Resources Inc | Denver, CO 80222 | Oil & Gas Operator | Mar 2000 |
| 20268 | Nasser Oil & Gas, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 20269 | Nat. Gas Pipeline Co Of Amer. | | Oil Operator | Dec 2008 |
| 20270 | Nataraja Oil Corporation | Foley, AL 36535 | Oil Operator | Aug 2010 |
| 20271 | Natchez Operating, LLC | | Oil & Gas Operator | Nov 2023 |
| 20272 | Natchez Pipe & Equip. Co., Inc | | Oil Operator | Nov 1981 |
| 20273 | Nathan C. Hale | | Oil & Gas Operator | Jan 2025 |
| 20274 | Nathan Hale Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 20275 | Nathan Petroleum Corp., Yahn & Yahn Inc | Rexville, NY 14877 | Oil & Gas Operator | Dec 2024 |
| 20276 | Nathan Petroleum Corporation | Rexville, NY 14877 | Oil & Gas Operator | Dec 2024 |
| 20277 | National Coopera | | Oil & Gas Operator | Mar 1992 |
| 20278 | National Cooperative Refinery Assoc. | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 20279 | National Cooperative RFG Assoc | McPherson, KS 67460-1404 | Oil & Gas Operator | Oct 2025 |
| 20280 | National Crude O | | Oil & Gas Operator | Jun 1991 |
| 20281 | National Develop | | Oil & Gas Operator | Jan 1990 |
| 20282 | National Energy Exp Inc | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 20283 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 20284 | National Exploration Company | | Oil & Gas Operator | Mar 1982 |
| 20285 | National Fuel Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Oct 2025 |
| 20286 | National Fuel Gas Supply Corporation | | Gas Operator | Dec 2010 |
| 20287 | National Investors Group | Warren, OH 44481 | Oil & Gas Operator | Nov 1996 |
| 20288 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 20289 | National Oil Co Ohio The | Columbus, OH 43215 | Oil & Gas Operator | Sep 1999 |
| 20290 | National Oil Com | | Oil & Gas Operator | Oct 1992 |
| 20291 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 20292 | National Onshore LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 20293 | National Petrole | | Oil & Gas Operator | Dec 1996 |
| 20294 | National Petroleum Reserves, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Apr 2012 |
| 20295 | National Pride Operating | Parker, CO 80134 | Oil & Gas Operator | Dec 2017 |
| 20296 | National Surface & Minerals, LLC | Addison, TX 75001 | Gas Operator | Jan 2023 |
| 20297 | National Treasure Mines | San Marina, CA 91118 | Oil Operator | Dec 1998 |
| 20298 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Aug 2025 |
| 20299 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 20300 | Nativity Of Our Lord | Orchard Park, NY 14127 | Gas Operator | Dec 2024 |