1. Abdi Sarana Nusa, PT (Exploration) Address Jl. Pelepah Kuning I Blok WD I No. 16, Kelapa Gading Jakarta 14240 Phones(62-21) 911-3411 Fax(62-21) 450-8547 , (62-21) 5488-5125

1. PT. Agung Usaha Perkasa Mall Ambasador Building 1st Floor, Suite #1 Jl. Prof. DR. Satrio Kav.52 Jakarta Selatan (021) 5793 3701 (021) 5793 3705 2. PT. Adi Arta Swabuana Jl. Pluit Karang Timur No.103 Jakarta Utara (021) 663 1903 (021) 661 5203 3. PT. Apexindo Pratama Duta Tbk Medco Building Lt. 2 -3 Jl. Ampera Raya No.20 Jakarta Selatan (021) 780 4766 (021) 780 4666 4. PT. Aqza Dharma Wisma Kosgoro Lt.19 Jl. M.H. Thamrin No.53 Jakarta (021) 361 229 (021) 322 169 5. PT. Arthindo Utama Wijaya Grand Centre Block F 46 -47 Jl. Darmawangsa Raya Jakarta Selatan (021) 720 2867, 720 6281 (021) 720 7111 6. PT. Bahari Rigindo Sarana Jl. Arjuna No.28 Tomang Tol Jakarta (021) 566 6712, 564 0784 (021) 564 0782, 566 8667 7. PT. Barata Nusatama Prima Plaza Setiabudi I Blok D 5 Jl. H.R. Rasuna Said Kav.62 Jakarta (021) 521 0418 (021) 520 1049 8. PT. Barikin Sakti Jl. Hang Lekir IX No.1 Jakarta 12120 (021) 722 1077 (021) 723 3855 9. PT. Bias Drilling Utama Jl. Melati Kav.7 Ampera Raya -Kemang Jakarta Selatan (021) 780 0479 (021) 7883 7006 10. PT. Binakarindo Yaco Agung Jl. Pangeran Jayakarta No.42 Jakarta Barat (021) 629 6166, 624 9155 (021) 639 8111, 625 2493 11. PT. Bormindo Nusantara Jl. Pakubuwono VI No.1A Jakarta Selatan (021) 722 9986 (021) 722 9987 12. PT. Calmusindo Energy Services Graha BIP Lt.5 Jl. Jenderal Gatot Subroto Kav.23 Jakarta (021) 530 0490, 5302 0490 (021) 530 2031 13. PT. Citra Insulindo Abadi Plaza Pacific Jl. Boulevard Barat Raya No.A4-82 Kelapa Gading Jakarta Utara (021) 4584 7129, 4584 7506 (021) 4584 7130, 4584 7507 (021) 4584 4623 14. PT. Deka Petrindo Fortuna Building Jl. Mampang Prapatan No.96 Jakarta Selatan (021) 724 5076, 720 6677 (021) 725 1894 15. PT. Dimas Drillindo Wisma Aldiron Dirgantara Lt.4 Jl. Jenderal Gatot Subroto Kav.79 Jakarta (021) 7919 6316, 7919 6317 (021) 425 6679

16. PT. Dinamik Dayabor Ciptakarsa Jl. Gaharu I No.15 Cilandak Barat Jakarta Selatan (021) 7591 3331 (021) 7591 3331 17. PT. Drillco Jaya Abadi Gelael Building G III Jl. Tebet Raya No.8-10 Jakarta Selatan (021) 8370 3608 (021) 8370 3612 18. PT. Ensco Sarida Offshore Jl. Warung Buncit No.75 Jakarta Selatan (021) 798 9081 (021) 798 9081 19. PT. Elnusa Workover Services Graha Elnusa Jl. T.B. Simatupang Kav.1B Jakarta 12560 (021) 7883 1210 (021) 7883 1209 20. Elnusa Bangkanai Energy Ltd. Graha Elnusa 7th Floor Jl. T.B. Simatupang Kav.1B Jakarta 12560 (021) 7884 1201 (0210 781 8432 21. PT. Essarindo Tirtajasa Satmarindo Building Jl. Bungur Raya No.5 Jakarta Selatan (021) 780 0346 (021) 780 0630 22. PT. Fajar Energy Persada CBS Building Lt.3 Jl. Benhil Raya No.74 Jakarta Pusat (021) 570 0701 (021) 570 0701 23. PT. General Buditekindo Jl. Gondangdia Jakarta (0765) 595 920 (0765) 94463 24. PT. Hitek Nusantara Offshore Drilling Sentra Mulia Building Lt.18 Jl. H.R. Rasuna Said Kav.X-6 No.8 Jakarta Selatan (021) 522 7250 (021) 522 7331 25. PT. Huabei Petroleum Service Gedung BRI II Jl. Jenderal Sudirman Jakarta (021) 5793 0950 (021) 251 2659 26. PT. Indrillco Bakti Komplek Perkantoran Pulo Mas Blok 11/13 Jl. Perintis Kemerdekaan Jakarta (021) 489 2500 (021) 489 3565 27. PT. Instrumenindo Petrotama Jl. Legoso Permai No.1 Cilandak Jakarta Selatan (021) 749 9912 (021) 742 0264 28. PT. Lins Petrotama Energi Drilling Contractor Perumahan Tityan Kencana Jl. Raden Patah Blok DD1 No.15-16 Bekasi (021) 88978532 (021) 8897 1222 29. PT. Mutiara Biru Perkasa Setia Budi Building Jl. H.R. Rasuna Said No.62 Jakarta Selatan (021) 525 7786 (021) 520 1031 30. PT. Mutiara Virgo Jl. K.H. Wahid Hasyim No.65 Jakarta (021) 390 3690 (021) 390 3689 31. PT. Patra Drilling Contractor JL. Kemang Raya No.59 Jakarta Selatan (021) 7179 1478, 7179 2007 (021) 7179 1263 32. PT. PDSI Jl. Kramat Raya (021) 3913 6117 (021) 315 4817, 315 4818

Jakarta Pusat 33. PT. Plumpang Raya Anugrah Jl. Plumpang Raya 25B, Semper Jakarta Utara (021) 4390 8426, 4390 8427 (021) 437 1605 34. PT. Prima Jasa Energy Wisma Pondok Indah Jl. Sultan Iskandar Muda Jakarta Selatan (021) 769 7422 (021) 769 7425 35 PT. Putra Kencana Basilam Petrogas Putra Kalimantan Building 4th Floor Jl. Jenderal Gatot Subroto Kav.12-13 Jakarta Selatan (021) 525 0825, 520 5059 (021) 520 4328 (021) 520 5059 37. PT. Sani Utama Jl. Sultan Syarif Qasim No.135 Pekanbaru -Riau (021) 29311 (0761) 43705 38. PT. Saptasarana Pesonaorima Jl. Taman Gandaria Blok D No.19 Jakarta Selatan (021) 7279 4036 (021) 723 5645 39. PT. Santa Fe Supraco Indonesia Jl. Melawai IX No.2 Kebayoran Baru Jakarta Selatan (021) 721 1700 (021) 721 1714 40. PT. Saripari Pertiwi Abadi Wisma BSG Jl. Abdul Muis Jakarta Pusat (021) 350 5370 (021) 350 5371, 384 1980 41. PT. Sinar Riau Drillindo Jl. T.B. Simatupang Jakarta (021) 7813 0850, 788 3088 (021) 7884 3627 42. PT. Sele Raya Wisma Bank Dharmala Jl. Jenderal Sudirman Kav.38 Jakarta (021) 521 1873 (021) 521 1876 43. PT. Schlumberger Geophysics Nusantara Cilandak Commersial Estate, Building 401 Jl. Raya Cilandak KKO Jakarta 12560 (021) 780 2034 (021) 780 7600 44. PT. Tekindo Kerjatama Komplek Perkantoran Sunter ASRI III Jl. Sunter Permai Raya Blok J -1 No.1 Jakarta 14350 (021) 651 9988 (021) 651 1010 45. PT. Tiga Musim Mas Jaya Juanda Regency Building Tower Jl. Ir. H. Juanda I No. 1 Jakarta (021) 350 0286 (021) 350 0289 46. PT. Tridiantara Alvindo Jl. Abdul Muis No.46 Jakarta (021) 386 1010 (021) 380 5944 47. PT. Usayana Head Office, Jl. Matraman Raya No. 87 Jakarta Timur 13140 (021) 857 0783, 857 0777 (021) 857 078, 857 0801 (021) 857 0778 (021) 857 0778, 857 0782 (021) 857 0801 48. PT. Welltekindo Nusantara