BP MIGASGedung Wisma Mulia Lt. 29Jl. Gatot Subroboto No. 43 JakartaTelp. (021)-29241607

BP IndonesiaPerkantoran Hijau ArkadiaJl. Letjen TB. Simatupang Kav. 88Jakarta 12420Po Box 1063 / JKT 10010Telp. (021)-78838000

Chevron Indonesia CoSentral Senayan I Office Tower Lt. 12Jl. Asia-Afrika No. 8Jakarta 10270Telp. (021)-5731020

Halliburton IndonesiaCilandak Commercial Estate Building 107 MJl. Raya Cilandak KKOJakarta 12560Telp. (021)-7801100

ExxonMobil Oil Indonesia Inc.Jl, Jend. Sudirman No. 28Jakarta 10210Telp. (021)-5740707

PT. Schlumberger Geophysics NusantaraSentra Mulia Building Lt. 16Jl. HR. Rasuna Said Kav X-6 No. 8Kuningan, Jakarta Selatan, Jakarta 12940Telp. (021) 5229157

PT ANTAM (Persero) TbkGedung Aneka TambangJl. Letjen TB Simatupang No. 1 Lingkar Selatan, Tanjung BaratJakarta 12530,IndonesiaTel. : (021) 789 1234, 781 2635Fax. : (62-21) 789 1224

PT. Petronas CarigaliCitibank Tower Lt. 27 Bapindo PlazaJl. Jend. Sudirman Kav. 54-55Jakarta 10270Telp. (021)-5266662 / (021)-5266667

Japan PetroleumSentra Mulia Building Lt. 7 – Suite 715Jl. HR. Rasuna Said Kav X-6 No. 8Jakarta 12940Telp (021)-52907024

GeoserviceJl. Minangkabau Barat No. 34Jakarta 12960Telp (021)-8305555

Lirik PetroleumSatmarindo BuildingJl. Ampera Raya No. 5Cilandak, Jakarta Selatan 12560Telp. (021)-7805000

ENI IndonesiaKuningan Plaza, South Tower Suite 901Jl. HR. Rasuna Said Kav. C 11-14Jakarta 12940Telp. (021)-30003200

PT. PertaminaGedung Pertamina PusatGedung Utama Lt. 3Jl. Medan Merdeka Timur No. 1 AJakarta PusatTelp. (021)-3815000

Baker Hughes IndonesiaGarden Center, Suite 07 Lt. 6Cilandak Commercial EstateJl. Raya Cilandak KKO - Po Box 7508Jakarta 12560Telp. (021)-7800737

HESS IndonesiaTHE ENERGY, Lt. 11-12SCBD Lot 11 AJl. Jend. Sudirman Kav. 52-53Jakarta 12190Telp. (021)29951000

HRD ManagerPT. Kotaminyak InternusaJl. Bandengan Selatan No. 60 AJakarta 14450-IndonesiaTelp. (021)-6621725

WeatherfordPT. Weatherford IndonesiaTALAVERA Office ParkJl. Letjen. TB. Simatupang Kav. 22-26 Lt. 5Jakarta Selatan 12430, IndonesiaTelp. (021)-75996200

Medco Energi The Energy 52nd Fl.SCBD Lot 11AJl. Jend. SudirmanJakarta 12190, Indonesia

Tel: (62-21) 2995 3000Fax: (62-21) 2995 3001

Premier OilPremier Oil Natuna Sea BVThe Jakarta Stock Exchange BuildingTower 1, 10th floorSudirman Central BusinessDistrictJalan Jendral Sudirman Kav.52-53Jakarta 12190IndonesiaTel: +62 21 515 1800

Perusahaan Gas NegaraHEAD OFFICEJl. K.H. Zainul Arifin No. 20Jakarta 11140 IndonesiaPO BOX 1119 JKTTelp 021 633 4838

PT. ELNUSA TbkHeadquarters Graha Elnusa, 16th Floor Jl. TB Simatupang Kav. 1 B Jakarta12560 INDONESIAPhone : 62-21 7883 0850 Faximile : 7883 0883 7883 0907

Energi Mega PersadaPT Energi Mega Persada Tbk.Bakrie Tower 22nd - 32nd FloorKomplek Rasuna EpicentrumJl. HR. Rasuna saidJakarta Selatan 12960Telp +62 21 2994 1500, +62 2557 7000

PT. AdaroMenara Karya, 23rd FloorJalan H.R. Rasuna Said Block X-5, Kav. 1-2Jakarta 12950, IndonesiaPhone: +6221-521-1265

PT. Japan Drilling IndonesiaWisma Kyoei Prince, 17th floor Jl. Jenderal Sudirman Kav 3 - 4, Kel. Karet Tengsin, Kec. Tanah Abang, Jakarta10220, IndonesiaTEL : +62-21-572-3027 / FAX : + 62-21-572 3020

PT. Timah Persero Tbk. Head OfficeJl. Jenderal Sudirman 51Pangkal Pinang 33121,Bangka, IndonesiaTel. +62 717 425 8000Fax. +62 717 425 8080