| 20401 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 20402 | Nexen Oil And Gas U.S.A. Inc. | Calgary, AB T2P 5C1 | Oil & Gas Operator | Feb 2010 |
| 20403 | Nexen Petroleum U.S.A. Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2012 |
| 20404 | Nexstreem Corporation | | Oil & Gas Operator | Dec 2020 |
| 20405 | Nextraction Energy Us Inc | Las Vegas, NV 89169 | Oil & Gas Operator | Feb 2018 |
| 20406 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 20407 | Ney Oil Operations | | Oil Operator | Apr 1998 |
| 20408 | Neyer Oil Inc | | Oil & Gas Operator | Nov 1997 |
| 20409 | Neyman, Robert L. & Maureen J. | Batavia, NY 14020 | Gas Operator | Dec 2024 |
| 20410 | Neymeiyer John Oil Co | | Oil Operator | Dec 1998 |
| 20411 | NFC Petroleum Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1996 |
| 20412 | Nfcda Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 20413 | NFR Bear Paw Basin, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2013 |
| 20414 | NFR Energy, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2017 |
| 20415 | NGC Energy Co. | | Oil & Gas Operator | May 1989 |
| 20416 | Ngezi, LCC | Fort Worth, TX 76111 | Oil & Gas Operator | Oct 2025 |
| 20417 | NGL Processing, LLC | | Oil Operator | Jun 2000 |
| 20418 | NGM Noble LTD | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 20419 | Ngo Development Corp. | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 20420 | NGX Company | Roswell, NM 88202 | Oil & Gas Operator | Jul 2008 |
| 20421 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 20422 | NHRG Inc | Wichita Falls, TX 76308 | Oil Operator | Oct 2025 |
| 20423 | Nicco Operating Co. | | Oil & Gas Operator | May 1990 |
| 20424 | Nicholas Water Service, Inc. | Zenda, KS 67159 | Oil Operator | Mar 2006 |
| 20425 | Nichols Brothers | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 20426 | Nichols Fluid Service, Inc. | Liberal, KS 67901 | Oil Operator | Jun 2019 |
| 20427 | Nichols Oil & Gas Corporation | Shreveport, LA 71135 | Oil & Gas Operator | Aug 2003 |
| 20428 | Nichols Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 20429 | Nichols Oil Corp. | Holcomb, KS 67846 | Oil Operator | Dec 1994 |
| 20430 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 20431 | Nichols Water Service Inc | Forgan, OK 73938 | Oil & Gas Operator | May 2018 |
| 20432 | Nichols, Carl E. | Azle, TX 76098 | Oil & Gas Operator | Aug 2004 |
| 20433 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 20434 | Nichols, John Wesley | Little Elm, TX 75068 | Oil & Gas Operator | Jul 2011 |
| 20435 | Nichols,Edwin S Explorations Inc | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 20436 | Nick Oil | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 20437 | Nickel Road Operating LLC | | Oil & Gas Operator | Sep 2024 |
| 20438 | Nickell & Son Oil & Salvage | Parker, KS 66072 | Oil Operator | Aug 2006 |
| 20439 | Nickell Drilling | | Oil Operator | Jun 2010 |
| 20440 | Nickell Oil Company | Walters, OK 73572 | Oil Operator | Apr 2018 |
| 20441 | Nickerson, Royal | Clymer, NY 14724 | Gas Operator | Dec 2024 |
| 20442 | Nicki T Oil & Gas LLC | Midland, TX 79711 | Oil Operator | Oct 2025 |
| 20443 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 20444 | Nicklos Oil & Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1986 |
| 20445 | Nicolaysen G G Jr | | Oil & Gas Operator | Dec 1995 |
| 20446 | Nicor Exploration | | Oil Operator | Jul 1993 |
| 20447 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 20448 | Nicor Production Company | Houston, TX 77002 | Oil & Gas Operator | May 1993 |
| 20449 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 20450 | Niedorf, Patrick Stephen | San Antonio, TX 78239 | Oil Operator | Jul 2001 |
| 20451 | Niefergold, Martin & Suzanne | Lawtons, NY 14091 | Gas Operator | Dec 2024 |
| 20452 | Niehage Oil Company, LLC | McPherson, KS 67460 | Oil Operator | Apr 2025 |
| 20453 | Nielco, Inc. | Billings, MT 59103 | Oil & Gas Operator | Apr 2002 |
| 20454 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 20455 | Nielson Capital Partners LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2014 |
| 20456 | Nielson Enterpri | | Oil & Gas Operator | Sep 1987 |
| 20457 | Nieset Lawrence & Christopher | Helena, OH 43435 | Oil Operator | Dec 2024 |
| 20458 | Night Owl Well Service | Cairo, WV 26337-0000 | Oil & Gas Operator | Dec 2021 |
| 20459 | Nightengale Henr | | Gas Operator | Nov 1996 |
| 20460 | Nighthawk Production LLC | | Oil & Gas Operator | Jun 2018 |
| 20461 | Nijean, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2012 |
| 20462 | Nimrod Petroleum Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Dec 2002 |
| 20463 | Nine Point Energy, LLC | | Oil & Gas Operator | Oct 2021 |
| 20464 | Nineveh Corp. | Dallas, TX 75208 | Oil & Gas Operator | Oct 2025 |
| 20465 | Niobrara Illuminating Gas Associates LLC | | Oil & Gas Operator | Oct 2009 |
| 20466 | Nip-N-Tuck Minerals, Inc. | | Gas Operator | Feb 1988 |
| 20467 | Nippon Oil Exploration USA LTD | | Oil & Gas Operator | Dec 2010 |
| 20468 | Nisrol, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2018 |
| 20469 | Nitcher, Benton L. | Wellsville, KS 66092 | Oil & Gas Operator | Dec 1995 |
| 20470 | Nitro Energy, Inc. | | Gas Operator | Dec 2005 |
| 20471 | Nitro Oil & Gas, LLC | Cuero, TX 77954 | Oil & Gas Operator | Oct 2025 |
| 20472 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 20473 | Nitro-Lift/Ok Manufacturing, LLC | | Oil Operator | Oct 2025 |
| 20474 | Nitschke, Dan E. | Henrietta, TX 76365 | Oil & Gas Operator | Oct 2025 |
| 20475 | Nivens Productions LLC | Coyle, OK 73027-9785 | Oil & Gas Operator | Aug 2024 |
| 20476 | Nix, Tommy | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 20477 | Nixon Properties Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2023 |
| 20478 | Nixon R P Operat | | Oil Operator | Aug 1995 |
| 20479 | Nizen, Stanley | FT Stockton, TX 79735 | Oil & Gas Operator | May 2002 |
| 20480 | Nja Operating LLC | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 20481 | Nject Disposal LLC | Houston, TX 77027 | Oil Operator | Mar 2017 |
| 20482 | NJL Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Feb 2007 |
| 20483 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 20484 | NKC Energy, LLC | Bruceville, TX 76630 | Oil Operator | Oct 2025 |
| 20485 | NLC Newstead Holdings LLC | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 20486 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 20487 | NMR Energy LLC | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 20488 | NMT Oil Company Inc. | | Oil & Gas Operator | Aug 2025 |
| 20489 | Nne Resources LLC | Charleston, WV 25301 | Oil & Gas Operator | Dec 2021 |
| 20490 | Nnogc Exploration & Production, LLC | Window Rock, AZ 86515 | Oil & Gas Operator | Jul 2025 |
| 20491 | Noah, Calvin | Valley Center, KS 67147 | Oil Operator | Oct 2010 |
| 20492 | Noarko Resources | | Oil & Gas Operator | Mar 1990 |
| 20493 | Nobbs, Gary H. And Bosinski, Kathy | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 20494 | Nobel Petroleum USA Inc. | League City, TX 77573 | Oil Operator | Oct 2025 |
| 20495 | Noble & Cantrell Expl. Co., Inc. | Winnsboro, TX 75494 | Oil & Gas Operator | Aug 2006 |
| 20496 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 20497 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Oct 2025 |
| 20498 | Noble Exploration, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2003 |
| 20499 | Noble Gas Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 1997 |
| 20500 | Noble Oil Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1996 |