Translation CEN 016-2020 August 14, 2020 Subject Management Discussion and Analysis for business operation of Quarter 2/2020 To The Manager and President The Stock Exchange of Thailand Capital

1 Translation CEN 001-2021 March 1, 2021 Subject Management Discussion and Analysis for the year 2020 To The Manager and President The Stock Exchange of Thailand Capital Engineering Network Public

President The Stock Exchange of Thailand Capital Engineering Network Public Company Limited (“the company” or “CEN”) hereby noticed that resolution from Board of Directors No.4/2020 held on August 14, 2020

: BI.IO.(1) 19/2018 September 18, 2018 President The Stock Exchange of Thailand Dear Sir, Re : Investment of common shares in Thai Payment Network Company Limited On behalf of Bangkok Bank Public Company

ที่ ITV / 2545 - Translation - AIS-CP 015/2020 18 June 2020 Subject: Establishment of new joint venture and subsidiary company To: President The Stock Exchange of Thailand Advanced Info Service Plc

ที ่B52-2020-08/001 14 August 2020 Subject: Management Discussion and Analysis - for the three-month period ended 30 June 2020 To: The President of Stock Exchange of Thailand B-52 Capital Public

Microsoft Word - SET-AIS-CP 007-2020 Acquisition of spectrum license.docx (Translation) AIS-CP 007/2020 19 February 2020 Subject: Acquisition of spectrum license To: President The Stock Exchange of

: President The Stock Exchange of Thailand Regarding to JMT Network Services PCL. (“the Company”) No.4/2019 on 13 November 2019, the resolution to certify the financial statements and performance of the Company

ending 31 March 2019 Attention: President The Stock Exchange of Thailand Regarding to JMT Network Services Public Company Limited (“the Company”) No.2/2019 on 9 May 2019, the resolution to certify the

Network Services Public Company Limited - Translation - Ref: IR61/009 11 May 2018 Subject: Management Discussion and Analysis, 1st Quarter ending 31 March 2018 Attention: President The Stock Exchange of