| Business | Phone |
| Adg Resources 2989 S Magnolia Way, Denver 80224 | (303) 756-3833 |
| Advanced Resources Intl 1401 17th St # 400, Denver 80202 | (303) 295-2722 |
| Advantage Resources Inc 1775 Sherman St # 1700, Denver 80203 | (303) 831-1912 |
| Aexco Petroleum Inc 1660 Lincoln St # 2812, Denver 80264 | (303) 863-1110 |
| Allen Drilling Co 518 17th St, Denver 80202 | (303) 629-6660 |
| Amber Resources Co 475 17th St # 1400, Denver 80202 | (303) 293-9133 |
| Anchor Bay Corp 1600 Stout St # 750, Denver 80202 | (303) 629-1098 |
| Anderman Oil Corp 1775 Sherman St # 2080, Denver 80203 | (303) 839-5013 |
| Anderson Energy Corp 1630 Welton St # 300, Denver 80202 | (303) 892-0123 |
| Anderson Management Co 650 S Cherry St # 400, Denver 80246 | (303) 388-3322 |
| Anschutz Corp 555 17th St # 2400, Denver 80202 | (303) 298-1000 |
| Antelope Energy Co 1801 Broadway # 1440, Denver 80202 | (303) 629-6400 |
| Antero Energy Llc 1645 Court Pl # 319, Denver 80202 | (303) 292-0051 |
| Antero Resources Corp 1625 17th St, Denver 80202 | (303) 357-7310 |
| Armstrong Oil & Gas Inc 700 17th St, Denver 80202 | (303) 623-1821 |
| Aspect Energy Llc 511 16th St, Denver 80202 | (303) 573-7011 |
| Aspen Exploration Corp 2050 S Oneida St # 208, Denver 80224 | (303) 639-9860 |
| D S Engineering Inc 2010 W 120th Ave, Denver 80234 | (303) 439-7151 |
| Dart Oil Co 3650 S Yosemite St # 400, Denver 80237 | (303) 779-9081 |
| Energy Corp Of America 4643 S Ulster St # 1100, Denver 80237 | (303) 694-2667 |
| Lario Oil & Gas Co 8055 E Tufts Ave # 1200, Denver 80237 | (303) 595-8030 |
| Linmar Petroleum 7979 E Tufts Ave, Denver 80237 | (303) 733-8003 |
| B & J Resources 410 17th St # 1150, Denver 80202 | (303) 623-2001 |
| Gary Babcock 730 17th St # 420, Denver 80202 | (303) 830-7448 |
| Bear Paw Energy Inc 1625 Broadway # 2300, Denver 80202 | (303) 626-8282 |
| Bearcat Inc 1200 17th St, Denver 80202 | (303) 298-1400 |
| Benson Mineral Group 1560 Broadway # 1900, Denver 80202 | (303) 863-3500 |
| Berco Resources 1200 17th St # 600, Denver 80202 | (303) 825-1188 |
| Berry Petroleum Co 410 17th St, Denver 80202 | (303) 825-3344 |
| Bickerstaff Associates Inc 518 17th St # 660, Denver 80202 | (303) 841-4306 |
| Bill Barrett Corp 1099 18th St # 2300, Denver 80202 | (303) 293-9100 |
| Black Coral Ltd 2555 S Santa Fe Dr # 210, Denver 80223 | (303) 722-5833 |
| Bluffstone Associates 3300 E 1st Ave, Denver 80206 | (303) 296-4199 |
| W G Boonenberg 1801 Broadway, Denver 80202 | (303) 573-7080 |
| Breitenbach Petroleum Corp 410 17th St, Denver 80202 | (303) 534-4919 |
| Bridge Petroleum 1580 Lincoln St # 1110, Denver 80203 | (303) 831-9022 |
| Brinkerhoff Co 1600 Broadway # 1430, Denver 80202 | (303) 830-0020 |
| H Kirk Brown Iii 1776 Lincoln St # 1020, Denver 80203 | (303) 832-1350 |
| Brownlie Wallace Armstrong 475 17th St # 1300, Denver 80202 | (303) 295-0565 |
| C P Resources 1625 Broadway, Denver 80202 | (303) 592-8070 |
| Cabot Oil & Gas Corp 600 17th St # 900n, Denver 80202 | (303) 226-9400 |
| Cachco Investments 2390 S Downing St, Denver 80210 | (303) 744-0444 |
| Calfrac Well Svc 717 17th St # 1445, Denver 80202 | (303) 293-2931 |
| Calpine Natural Gas 1200 17th St, Denver 80202 | (720) 359-9144 |
| Cam West Inc 1825 Lawrence St # 300, Denver 80202 | (303) 296-2012 |
| Carbon Energy Corp 1700 Broadway, Denver 80290 | (303) 863-1555 |
| Central Operating Inc 1600 Broadway # 1050, Denver 80202 | (303) 894-9576 |
| Central Resources Inc 1775 Sherman St # 2600, Denver 80203 | (303) 830-0100 |
| Chaco Energy Co 455 Sherman St, Denver 80203 | (303) 744-2034 |
| Chandler Energy 475 17th St # 1210, Denver 80202 | (303) 297-2028 |
| Chase Petroleum Corp 1720 Wazee St # 5e, Denver 80202 | (303) 592-1224 |
| Chelsea Corp 1776 Lincoln St # 950, Denver 80203 | (303) 863-3965 |
| Cholla Production Llc 1641 California St # 300, Denver 80202 | (303) 623-4565 |
| Christopher P Gough Consult 1645 Court Pl, Denver 80202 | (303) 893-9020 |
| Lawton L Clark 1800 Glenarm Pl # 200, Denver 80202 | (303) 298-9918 |
| Club Oil & Gas Inc 1875 Lawrence St, Denver 80202 | (303) 623-4158 |
| Cmr Operating Co 1955 E Arizona Ave, Denver 80210 | (303) 733-4699 |
| Contel Office Communication 370 17th St, Denver 80202 | (303) 534-5271 |
| Coral Production Corp 1600 Stout St # 1500, Denver 80202 | (303) 623-3573 |
| R Scott Craig 731 S Jackson St, Denver 80209 | (303) 573-3900 |
| Credo Petroleum Corp 1801 Broadway # 900, Denver 80202 | (303) 297-2200 |
| Crestone Energy Ventures Llc 1400 16th St # 310, Denver 80202 | (720) 946-3600 |
| Crimson Resource Management 410 17th St # 1010, Denver 80202 | (303) 892-9333 |
| Shell Rocky Mtn Production Llc 4582 S Ulster St, Denver 80237 | (303) 305-7550 |
| Custom Geophysical Svc 1331 17th St # 408, Denver 80202 | (303) 292-3483 |
| Dekalb Energy Tower 1625 Broadway, Denver 80202 | (303) 571-0162 |
| Delta Petroleum Corp 370 17th St # 4300, Denver 80202 | (303) 293-9133 |
| Directional Petroleum Corp 518 17th St # 1420, Denver 80202 | (303) 825-7210 |
| Discovery Exploration Inc 621 17th St # 1535, Denver 80293 | (303) 296-7553 |
| Dual Resources Inc 475 17th St, Denver 80202 | (303) 298-8665 |
| Dudley & Assoc Llc 1776 Lincoln St # 904, Denver 80203 | (303) 861-0800 |
| Duncan Oil Co 1777 S Harrison St # P-1, Denver 80210 | (303) 759-5441 |
| E Lyle Johnson Inc 720 S Colorado Blvd # 962, Denver 80246 | (303) 753-9281 |
| Edward Mike Davis Llc 730 17th St, Denver 80202 | (720) 946-6700 |
| Elk Resources Inc Oil & Petro 1401 17th St # 700, Denver 80202 | (303) 296-4505 |
| Emerald Resources Inc 410 17th St # 1720, Denver 80202 | (303) 572-0341 |
| En Cana Oil & Gas Usa Inc 370 17th St # 1700, Denver 80202 | (303) 623-2300 |
| Encana Oil & Gas Usa Inc 950 17th St, Denver 80202 | (303) 623-2400 |
| Endeavor Energy Llc 243 E 19th Ave # 203, Denver 80203 | (303) 830-1290 |
| Energy Operating Co 3773 Cherry Creek North Dr, Denver 80209 | (303) 969-9610 |
| Energy Search Co Inc 650 S Cherry St # 602, Denver 80246 | (303) 320-6546 |
| England Resources Corp Denver 80203 | (303) 861-3000 |
| Eog Resources Inc 600 17th St # 1100n, Denver 80202 | (303) 572-9000 |
| Esperanza Corp 475 17th St # 980, Denver 80202 | (303) 295-2595 |
| Estelle Wolf Oil Properties 1801 Broadway # 200, Denver 80202 | (303) 295-0351 |
| Evergreen Resources Inc 1401 17th St # 1200, Denver 80202 | (303) 298-8100 |
| Fancher Oil 1801 Broadway # 720, Denver 80202 | (303) 296-6600 |
| Fidelity Exploration & Prdctn 1700 Lincoln St # 4600, Denver 80203 | (303) 893-3133 |
| Fimlnatural Resources 410 17th St # 570, Denver 80202 | (303) 573-0385 |
| Find Oil & Gas Co 518 17th St # 390, Denver 80202 | (720) 359-1660 |
| First Australian Resources Inc 600 17th St, Denver 80202 | (303) 436-1800 |
| Forest Oil Corp 1600 Broadway # 2200, Denver 80202 | (303) 812-1400 |
| Fossol Associates 410 17th St, Denver 80202 | (303) 295-3699 |
| Freedom Energy 1433 17th St # 300, Denver 80202 | (303) 292-2442 |
| G & H Production Co 518 17th St # 930, Denver 80202 | (303) 534-0708 |
| Geo Concepts 1625 Broadway # 870, Denver 80202 | (303) 592-4560 |
| Gerard Geo Sciences 518 17th St # 430, Denver 80202 | (303) 534-7427 |
| Gilbert Stewart Operating 1801 Broadway, Denver 80202 | (303) 534-1686 |
| Gmt Inc 1560 Broadway # 800, Denver 80202 | (720) 946-3028 |
| Grc Researchctr 518 17th St # 600, Denver 80202 | (303) 573-5230 |
| Great Northern Gas Co 621 17th St # 2150, Denver 80293 | (303) 295-0938 |
| William W Griffith 600 17th St, Denver 80202 | (303) 892-5635 |
| Gunnison Energy Corp 1801 Broadway # 1200, Denver 80202 | (303) 296-4222 |
| H S Resources 1999 Broadway, Denver 80202 | (303) 297-3187 |
| Hal Mc Vey Oil & Gas 518 17th St # 390, Denver 80202 | (303) 623-4747 |
| Halcyon Exploration Co 1580 Lincoln St # 630, Denver 80203 | (303) 832-1555 |
| Harris Oil & Gas Co 1125 17th St # 2290, Denver 80202 | (303) 293-8838 |
| Wells Energy Co 7555 E Hampden Ave, Denver 80231 | (303) 743-0110 |
| Wells Petroleum Inc 518 17th St, Denver 80202 | (303) 623-3311 |
| Western Geco 1625 Broadway # 1300, Denver 80202 | (303) 629-9250 |
| Western Operating Co 518 17th St # 1680, Denver 80202 | (303) 893-2438 |
| White Eagle Exploration Inc 621 17th St # 2255, Denver 80293 | (303) 295-2080 |
| Whiting Petroleum Corp 1700 Broadway # 2300, Denver 80290 | (303) 837-1661 |
| Wilbanks Reserve Corp 1600 Stout St # 1710, Denver 80202 | (303) 825-4000 |
| Willsource Enterprises 730 17th St # 250, Denver 80202 | (303) 575-9696 |
| Yates Petroleum Corp 730 17th St # 320, Denver 80202 | (303) 572-3550 |
| Zalman Resources Inc 910 16th St, Denver 80202 | (303) 534-1739 |
| Zavanna 1600 Stout St # 560, Denver 80202 | (303) 595-8003 |
| Zinke & Trumbo Inc 1600 Stout St, Denver 80202 | (303) 534-4120 |
| Hoppe Kugler & Newberry 518 17th St, Denver 80202 | (303) 534-3232 |
| Houston Exploration Co 700 17th St, Denver 80202 | (303) 825-3389 |
| Vaught Oil Co 1225 17th St # 1475, Denver 80202 | (303) 294-9701 |
| Vector Seismic Data 1050 17th St, Denver 80265 | (303) 446-5700 |
| Vector Seismic Data Processing 1801 Broadway # 1700, Denver 80202 | (303) 571-1515 |
| Vmc Operating Co 1675 Broadway, Denver 80202 | (303) 592-5035 |
| W R Mc Kee Operating Inc 1580 Lincoln St # 500, Denver 80203 | (303) 832-1994 |
| Ichor Exploration Inc 600 17th St # 2620, Denver 80202 | (303) 825-8907 |
| Infinity Oil & Gas Inc 730 17th St # 250, Denver 80202 | (303) 825-0899 |
| Interactive Earth Sciences 1675 Broadway # 710, Denver 80202 | (303) 446-8649 |
| Intrepid Mining Llc 700 17th St # 1700, Denver 80202 | (303) 296-3006 |
| J K Brown Inc 1863 Wazee St # 6a, Denver 80202 | (303) 295-2223 |
| J K Edwards Assoc Inc 1401 17th St # 1400, Denver 80202 | (303) 298-1400 |
| Tipperary Corp 633 17th St # 1550, Denver 80202 | (303) 293-9379 |
| Tom Brown Inc 555 17th St # 1850, Denver 80202 | (303) 260-5000 |
| Tower Energy 1050 17th St # 1850, Denver 80265 | (303) 595-0125 |
| Trueblood Resources 1720 S Bellaire St # 908, Denver 80222 | (303) 782-0542 |
| Tundra Resources 1610 Wynkoop St, Denver 80202 | (303) 534-0488 |
| Tundra Resources Llc 730 17th St, Denver 80202 | (303) 534-0488 |
| United Western Exploration Co 475 17th St # 700, Denver 80202 | (303) 297-2117 |
| Jhl Oil & Gas 370 17th St, Denver 80202 | (303) 592-5230 |
| Julander Energy Co 501 Lincoln St, Denver 80203 | (303) 831-7800 |
| K I Danneberg Oil Operations 621 17th St, Denver 80293 | (303) 297-1373 |
| Kenisa Oil Co 518 17th St, Denver 80202 | (303) 825-7315 |
| Kerr-Mc Gee Oil & Gas Corp 1670 Broadway # 2800, Denver 80202 | (303) 573-5404 |
| Kerr-Mc Gee Oil & Gas Corp 1999 Broadway, Denver 80202 | (303) 296-3600 |
| Kinney Oil Co 1401 17th St # 870, Denver 80202 | (303) 295-1770 |
| Klabzuba Oil & Gas 700 17th St, Denver 80202 | (303) 299-9097 |
| Swanson Production Co 518 17th St # 1680, Denver 80202 | (303) 825-7243 |
| Tatex 410 17th St # 1100, Denver 80202 | (303) 620-9100 |
| Teton Petroleum Co 1600 Broadway # 2400, Denver 80202 | (303) 542-1878 |
| Thomasson Partner Assoc 1410 High St, Denver 80218 | (303) 436-1930 |
| Landmark Graphics Corp 1125 17th St # 1900, Denver 80202 | (303) 607-0045 |
| Laramie Energy Llc 1512 Larimer St # 1000, Denver 80202 | (303) 825-2154 |
| Liedtke Operating Corp 1117 S University Blvd, Denver 80210 | (303) 292-2390 |
| Southwestern Production Corp 1675 Larimer St # 820, Denver 80202 | (303) 534-6500 |
| Sovereign Energy Llc 621 17th St # 1520, Denver 80293 | (303) 297-0347 |
| Spider Ridge Resources 518 17th St, Denver 80202 | (303) 595-8820 |
| St Croix Exploration Co 600 17th St # 2620, Denver 80202 | (303) 595-4597 |
| St Mary Land & Exploration Co 1776 Lincoln St # 700, Denver 80203 | (303) 861-8140 |
| Stanley Energy Inc 1776 Lincoln St # 410, Denver 80203 | (303) 830-0998 |
| Stephen Smith Inc Denver 80202 | (303) 893-1727 |
| Stewart Petroleum Corp 475 17th St # 1250, Denver 80202 | (303) 799-1922 |
| Stone Energy Corp Llc 950 17th St # 2600, Denver 80202 | (303) 685-8000 |
| Savant Resources Inc 730 17th St, Denver 80202 | (303) 592-1905 |
| Scorpio Resources Inc 518 17th St # 775, Denver 80202 | (303) 595-9681 |
| Sequoyah Resource Partners 216 16th St, Denver 80202 | (303) 573-4410 |
| Shawn P Hannifin Oil Prpts 730 17th St, Denver 80202 | (303) 595-0786 |
| Sigmund J Rosenfeld Oil & Gas 1200 17th St # 2100, Denver 80202 | (303) 298-1722 |
| Slawson Exploration Co 1625 Broadway # 1450, Denver 80202 | (303) 592-8880 |
| Lyco Energy Corp 3263 S Niagara St, Denver 80224 | (303) 759-2248 |
| Madison Energy Advisors Inc 1401 17th St, Denver 80202 | (303) 770-6646 |
| Magnolia Oil Co 518 17th St # 345, Denver 80202 | (303) 534-5776 |
| Mariah Energy 1776 Lincoln St # 1314, Denver 80203 | (303) 866-0722 |
| Markus Production Inc 621 17th St # 1001, Denver 80293 | (303) 295-6910 |
| Marquez Energy Llc 370 17th St, Denver 80202 | (303) 626-8300 |
| Marsahll & Winston Inc 1600 Broadway # 1540, Denver 80202 | (303) 573-8010 |
| Marshall & Winston Inc 1600 Broadway, Denver 80202 | (303) 830-2058 |
| Martin Oil Corp 1041 17th St, Denver 80202 | (303) 297-1000 |
| Douglas B Mc Callum 245 Wyandot St, Denver 80223 | (303) 892-8868 |
| Mc Elvain Oil & Gas Properties 1050 17th St # 1800, Denver 80265 | (303) 893-0933 |
| Mead Oil Corp 826 16th St # 701, Denver 80202 | (303) 573-5328 |
| Medicine Bow Energy 1225 17th St # 1900, Denver 80202 | (303) 293-9999 |
| Melange Associates Inc 475 17th St, Denver 80202 | (303) 298-9415 |
| Meritage Energy Partners 1600 Broadway # 1360, Denver 80202 | (720) 932-0220 |
| Miller Consulting Svc 1543 Champa St # 400, Denver 80202 | (303) 572-7787 |
| Miller Consulting Svc 1641 California St, Denver 80202 | (303) 572-7787 |
| Robert J Kenney & Assoc 1401 17th St # 1430, Denver 80202 | (303) 296-4907 |
| Rock Ex Co 1880 Arapahoe St # 2211, Denver 80202 | (303) 384-3485 |
| Rsec Llc 1200 17th St, Denver 80202 | (303) 892-5616 |
| Ryan Energy Technologies Usa 475 17th St # 1330, Denver 80202 | (303) 296-2930 |
| Samuel Gary Jr & Assoc 1670 Broadway # 3300, Denver 80202 | (303) 831-4673 |
| San Marco Petroleum Inc 240 Milwaukee St # 2, Denver 80206 | (303) 321-0100 |
| Monument Resources Inc 2050 S Oneida St # 106, Denver 80224 | (303) 692-9468 |
| Morse Resources Inc 410 17th St, Denver 80202 | (303) 592-1011 |
| Mountain Home Exploration 1560 Broadway # 1470, Denver 80202 | (303) 831-0838 |
| Mountain States Fuel 1444 Wazee St # 350, Denver 80202 | (303) 292-0070 |
| Nadel Gussman Rockies Llc 621 17th St # 1720, Denver 80293 | (303) 296-2700 |
| Natural Gas & Oil Co 6825 E Tennessee Ave, Denver 80224 | (303) 321-4009 |
| New Millennium Resources 1641 California St # 410, Denver 80202 | (303) 297-0211 |
| Newfield Exploration 1401 17th St # 1000, Denver 80202 | (303) 893-0102 |
| Queenstake Resources Ltd 999 18th St # 2940, Denver 80202 | (303) 297-1557 |
| Questar Exploration & Prdctn 1050 17th St # 500, Denver 80265 | (303) 672-6900 |
| Redstone Resources Inc 410 17th St # 400, Denver 80202 | (303) 893-0283 |
| Resolute Natural Resources Co 1675 Broadway, Denver 80202 | (303) 534-4600 |
| Resource Solutions Llc 1600 Stout St # 1900, Denver 80202 | (303) 446-8566 |
| Revere Corp 1200 17th St, Denver 80202 | (303) 572-6444 |
| Rincon Exploration 700 17th St # 1100, Denver 80202 | (303) 892-6455 |
| Rincon Exploration Llc 410 17th St, Denver 80202 | (303) 892-6455 |
| Riva Oil & Gas 1645 Court Pl, Denver 80202 | (303) 534-4502 |
| Presco Western 1775 Sherman St, Denver 80203 | (303) 864-1881 |
| Prima Exploration Inc 7555 E Hampden Ave, Denver 80231 | (303) 755-5681 |
| Pyr Energy Corp 1675 Broadway # 2450, Denver 80202 | (303) 825-3748 |
| Noble Energy Inc 1625 Broadway # 2000, Denver 80202 | (303) 389-3600 |
| O'Brien Energy Resources Corp 518 17th St, Denver 80202 | (303) 825-1649 |
| O'Neal Resources Corp 1801 Broadway # 350, Denver 80202 | (303) 297-2777 |
| Oakmont Corp 621 17th St # 1101, Denver 80293 | (303) 298-9763 |
| Oasis Oil & Gas Co Inc 820 16th St, Denver 80202 | (303) 825-3880 |
| Oil & Gas Asset Clearinghouse Denver 80210 | (303) 744-8220 |
| Oilgener Inc 475 17th St # 700, Denver 80202 | (303) 297-0277 |
| Orion Energy Partners Llc 1675 Broadway, Denver 80202 | (303) 595-3030 |
| John W Oty 600 17th St, Denver 80202 | (303) 825-3511 |
| Paladin Energy Partners 410 17th St # 1200, Denver 80202 | (303) 893-6621 |
| Petro-Hunt 621 17th St # 1555, Denver 80293 | (303) 382-1914 |
| Petroglyph Energy Inc 410 17th St # 1230, Denver 80202 | (303) 623-5995 |
| Petrogulf Corp 518 17th St, Denver 80202 | (303) 893-5400 |
| Petrowest Exploration 410 17th St # 1150, Denver 80202 | (303) 595-8955 |
| Grdc Inc 1576 S Robb Way, Denver 80232 | (303) 986-2783 |