Notice of System Maintenance
HKEX will be performing scheduled system maintenance from 5:00 pm (HKT) to 11:59 pm (HKT) on 13 Dec 2025 (Saturday). During this period, our websites, email notification and other data services may be affected. Users may also experience interruptions or slow responses of other website services. Thank you for your patience and understanding.
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Subscriber Notices and Guidance Note

The Subscriber Notices have been distributed with all enclosures by email.

For enquiry, please contact Hosting Services by emailing to hssales@hkex.com.hk

Date Reference No. Subject
24/06/2025 HDS/25/0606 Regular System Recovery Rehearsal for Hosting Services on 19 Jul 2025
28/05/2025  HDS/25/0513  PTP Timing Service Switches Software upgrade for Data Hall B – Readiness Test and Post Release Test
03/03/2025 HDS/25/0301  PTP Timing Service Switches Replacement for Data Hall A & E – Readiness Test and respective migration schedules
28/08/2024
HDS/24/0820 Notice for HSN Switch Software Upgrade Post Release Tests
14/08/2024 HDS/24/0804

Regular System Recovery Rehearsal for Hosting Services on 7 Sep 2024

09/07/2024 HDS/24/0703 HKEX Service Network (“HSN”) Switch Software Upgrade Readiness Test
23/04/2024 HDS/24/0406 HKEX Service Network (“HSN”) Failure Rehearsal on 18 May 2024 (Saturday)
20/12/2023 HDS/23/1210  Post Release Tests for Firmware Upgrade of HKEX Backbone network for securities market systems

Appendix A: Intention Form
Appendix B: Post Release Tests Result Form

15/11/2023  HDS/23/1109  Second Practice Session for Firmware Upgrade of HKEX Backbone network for securities market systems

Appendix A: Intention Form
Appendix B: Practice Session Result Form

08/11/2023  HDS/23/1106 

Practice Session for Firmware Upgrade of HKEX Backbone network for securities market systems

Appendix A: Intention Form
15/08/2023 HDS/23/0810 Electronic signature support and new one-year service term option
31/07/2023  HDS/23/0706

Regular System Recovery Rehearsal for Hosting Services on 19 Aug 2023

04/04/2023 HDS/23/0402 Fee Adjustment for Rack and Power items
21/11/2022 HDS/22/1116  eService Submission via Client Connect
02/08/2022  HDS/22/0808

Regular System Recovery Rehearsal for Hosting Services on 27 Aug 2022

06/04/2022 HDS/22/0436 Fee Adjustment and New Rack Power Options
08/10/2021 HDS/21/1006

Regular System Recovery Rehearsal for Hosting Services on 6 Nov 2021

06/05/2021 HDS/21/0501 Enhancing our product & service range 
24/08/2020 HDS/20/0812

Regular System Recovery Rehearsal for Hosting Services on 19 Sep 2020

29/06/2020  HDS/20/0608  Launch of our new on-site storage & degaussing services
09/11/2019 HDS/19/1104 Successful completion of Network Switches Replacement for NTP on 9 November 2019
04/11/2019 HDS/19/1102

Network Switches Replacement for NTP on 9 November 2019

Attachment 1: NTP Test Result Confirmation Form on 9 November 2019

28/10/2019 HDS/19/1018 End of Stabilisation Period for HSN Firewalls and Network Switches Replacement
21/10/2019  HDS/19/1016 Network Switches Replacement for NTP Services – NTP Readiness Test 

Attachment 1: Participation Form of NTP Readiness Test and Verification Test

Attachment 2: NTP Test Result Confirmation Form

12/10/2019  HDS/19/1011 Successful completion of HSN Production Cutover Phase 3 for HSN Firewalls and Network Switches Replacement and commencement of stabilisation period
08/10/2019 HDS/19/1010 HSN Production Cutover for HSN Firewalls and Network Switches Replacement on 12 October 2019
05/10/2019 HDS/19/1007 Successful completion of HSN Production Cutover Phase 2 for HSN Firewalls and Network Switches Replacement
02/10/2019 HDS/19/1001 HSN Production Cutover for HSN Firewalls and Network Switches Replacement on 5 October and 12 October 2019
28/09/2019 HDS/19/0933
Successful completion of HSN Production Cutover Phase 1 for HSN Firewalls and Network Switches Replacement
26/09/2019  HDS/19/0928 

Hosting Services Subscriber Participation for Regular System Recovery Rehearsal on 19 Oct 2019

Appendix A: Confirmation Form of Hosting Services Subscriber Participation for Regular System Recovery Rehearsal

Appendix B: Evaluation Reply Form of Hosting Services Subscriber Participation for Regular System Recovery Rehearsal

23/09/2019  HDS/19/0929

HSN Production Cutover for HSN Firewalls and Network Switches Replacement on 28 September, 5 October and 12 October 2019

Attachment 1: Participation Form of HSN Production Cutover Verification Test

Attachment 2: HSN Production Cutover Verification Test Result Confirmation Form

10/09/2019 HDS/19/0912

Reschedule of HSN Readiness Test for HSN Firewalls and Network Switches Replacement to 21 September 2019

Attachment 1: Participation Form of HSN Readiness Test on 21 September 2019

Attachment 2: OTP-C Test Rundown for New HSN Readiness Test

Attachment 3: HSN Readiness Test for Exchange Participants (HKATS) 21 September 2019

Attachment 4: HSN Readiness Test on 21 September 2019 Information Package for HKCC SEOCH Participants

Attachment 5: HSN Readiness Test Result Confirmation Form

16/08/2019  HDS/19/0817

HSN Firewalls and Network Switches Replacement – HSN Readiness Test

Attachment 1: Participation Form of HSN Readiness Test on 31 August 2019

Attachment 2: OTP-C Test Rundown for New HSN Readiness Test

Attachment 3: HSN Readiness Test for Exchange Participants (HKATS) 31 August 2019

Attachment 4: HSN Readiness Test on 31 August 2019 Information Package for HKCC SEOCH Participants

Attachment 5: HSN Readiness Test Result Confirmation Form

25/07/2019 HDS/19/0712 Supplementary information for HSN Firewalls and Network Switches Replacement – HSN Connectivity Test on 27 July 2019
12/07/2019 HDS/19/0708

Reschedule for HSN Firewalls and Network Switches Replacement – Connectivity Test to 27 July 2019

Attachment 1: Participation Form of HSN Connectivity Test on 27 July 2019

Attachment 2: HSN Network Commissioning Test Plan for New HSN

Attachment 3: OTP- C Test Rundown for New HSN Connectivity Test

Attachment 4: HSN Connectivity Test for Exchange Participants (HKATS) 27 July 2019

Attachment 5: HKEX Connectivity Test on 27 July 2019 Information Package for HKCC / SEOCH Participants

Attachment 6: HSN Connectivity Test Result Confirmation Form

05/07/2019  HDS/19/0704

HSN Firewalls and Network Switches Replacement – HSN Connectivity Test

Attachment 1: Participation Form of HSN Connectivity Test on 20 July 2019

Attachment 2: HSN Network Commissioning Test Plan for New HSN

Attachment 3: OTP-C Test Rundown for New HSN Connectivity Test

Attachment 4: HSN Connectivity Test for Exchange Participants (HKATS) 20 July 2019

Attachment 5: HSN Connectivity Test on 20 July 2019 Information Package for HKCC / SEOCH Participants

Attachment 6: HSN Connectivity Test Result Confirmation Form

19/06/2019  HDS/19/0611 Network Equipment Replacement for HSN and NTP Services
17/05/2019 HDS/19/0505 Network Equipment Replacement for HSTN Services
24/04/2019 HDS/19/0405 Discontinuance of Ecosystem Network (ESN) Connectivity Service
20/12/2018 FIN/18/007

Autopay Arrangement for Payment of Fees and Charges to HKEX Hosting Services Limited (the Company)

Attachment 1 :Direct Debit Authorisation (Generic Set-up)           

8/10/2018 HDS/18/1016 Change of Company’s Registered Address
19/06/2018 HDS/18/0605

Hosting Services Subscriber Participation for Regular System Recovery Rehearsal on 14 July 2018

15/05/2018 HDS/18/0511 Change of Company’s Registered Address
31/10/2017  FIN/17/001 Implementation of e-Demand Note
30/08/2017 HDS/17/0820 New Cabling Path for Cross Connect Connectivity Service
13/06/2017 HDS/17/0606 Hosting Services Subscriber Participation for Regular System Recovery Rehearsal on 08 July 2017  
29/07/2016 HDS/16/0706 Hosting Services Subscriber Participation for Regular System Recovery Rehearsal on 27 August 2016
28/04/2016 N/A Ecosystem Forum 2016

Keynote Speech – Richard Leung, Managing Director and Co-Head of IT, HKEX

China Investment Information Platform (CIIP) Introduction Weng NianLong, Assistant to Managing Director, China Investment Information Services Limited

Market Data Initiatives and Recent Development – Winnie Leung, Vice President, Market Data Licensing, HKEX

China Stock Connect – Christopher Hui, Managing Director, Project Management, HKEX
23/02/2016 HDS/16/0205 Change of company name
05/05/2015 HDS/15/0502 Hosting Services Subscribers BCP Declaration following Regular System Recovery Rehearsal on 18 April 2015
27/04/2015 N/A Ecosystem Forum 2015

Keynote - The New Era of HKEX – Richard Leung, Managing Director and Co-Head of IT, HKEX

The Growing Commodity Trading Market in Asia – Rebecca Brosnan, Managing Director and Head of Asia Commodities, HKEX

Update on HKEX Equity Derivatives Market – PC Wong, Senior Vice President, Derivatives Trading, HKEX

Update on Volatility Control Mechanism and Closing Auction Session Consultation – Sally Kwok, Senior Vice President, Cash Trading, HKEX

Market Date Update – Winnie Poon, Senior Vice President and Head of Market Data, HKEX
23/03/2015 HDS/15/0304 Hosting Services Subscriber Participation for Regular System Recovery Rehearsal on 18 April 2015  
28/01/2015 HDS/15/0116 Fee Adjustment
02/09/2014 HDS/14/0901 New Deposit Requirement Effective 1st December 2014
12/08/2014 HDS/14/0802 Introduction of Hosting Services Application Service Provider (ASP) Framework
22/07/2014 HDS/14/0704 Hosting Services Subscriber Participation for Regular System Recovery Rehearsal on 9 August 2014
26/03/2014 N/A Ecosystem Forum 2014

HKEX Orion Technology Initiatives Updates - Richard Leung, Managing Director and Co-Head of IT Division, HKEX

HKEX's Derivatives Market Development Update - Wong Pak Chung, Senior Vice President, Equities & FIC, HKEX

Update on HKEX's CASH Market Development - Amy Wong, Vice President, Equities & FIC, HKEX

DCDi Infrastructure, Technology and Investment Trends: Which Global Gateway Cities are best placed to Lead Through to the Digital World? - Stephen Worn, Global CTO and Board Director, DataCenterDynamics (DCD Group)

Orion Market Data - Daniel Poon, Senior Vice President & Head of Market Data, HKEX

Market Integrity - Bryan Chan, Co-Head of Equities & FIC, Global Markets Division, HKEX
28/01/2014 HDS/14/0103 Fee Adjustment Due to another Electricity Cost Increase
09/01/2014 HDS/14/0102 Port Reconfiguration for HKEX Service Network (“HSN”) and Hosting Services Testing Network ("HSTN")
06/09/2013 HDS/13/0901 Hosting Services Subscriber Participation for Regular AMS/3 Rehearsal for System Recovery Under Emergency Situation on 14 September 2013
20/08/2013 HDS/13/0803 Derivatives Trading via HKEX Service Network (HSN) – Market Rehearsal for HKATS and DCASS Upgrade to Genium INET Platform
12/08/2013 HDS/13/0802 Derivatives Trading via HKEX Service Network (HSN) - Network Gateway (NG) Installation Tips
02/07/2013 HDS/13/0701 Derivatives Trading via HKEX Service Network (HSN)
24/04/2013 HDS/13/0401 HKEX Hosting Services Seminar - "Tips and Pitfalls in Data Center Selection to Run Your Trading Services"
22/03/2013 N/A Ecosystem Forum 2013

Keynote Speech - Richard Leung, SVP & Co-Head of IT

QuantHouse / S&P Capital IQ current global move to Asia - Julien Wilk, Head of Operations, APAC – QuantHouse

Thomson Reuters Elektron & Eikon Connecting the Global Financial Community - Michael Tsang, Managing Director, North Asia, Thomson Reuters

Orion Market Data Updates - Daniel Poon, VP & Head of Market Data

Orion Central Gateway Updates - Julian Ragless, SVP, Platform Development


Hosting Services Updates - Samuel Wong, AVP, Hosting Services

Integration between China’s Offshore and Onshore Equity Markets - Alton Lau, Assistant Vice President, Derivatives Trading, Global Markets, HKEX / Assistance Vice President, Product Development, CESC


Connect the leading Global Financial Centres by “Ultra Low latency” network - Roy Ng, Assistant Director, Head of Solution Consulting, ChinaTelecom

Genium Updates - Tony Yim, Senior Manager, Derivatives Trading            
28/02/2013 HDS/13/0201 HKEX Hosting Services Subscriber Notice - Electricity Cost Increase
21/12/2012 HDS/12/1201 HKEX Hosting Services Launch – End of Stabilization Period
08/10/2012 HDS/12/0009 No Extension of HSN Connectivity Outside the Data Center
03/07/2012 HDS/12/0701 Technical Briefing Session for HKEX Hosting Services - Connectivity and Timing Services
Enclosure : Enrollment Form of Technical Briefing Session
28/03/2012 HDS/12/0002 HKEX Hosting Services-Entry Level Package Offer
28/03/2012 News Release HKEX Announces Founding Members of the Hosting Services Ecosystem 
19/03/2012 HDS/12/0301 HKEX Hosting Services Information Briefing Sessions
13/02/2012 News Release HKEX Launches Founding Members Programme for Hosting Ecosystem at Next Generation Data Centre  

Updated 24 Jun 2025