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GB/T 46285-2025IPv6 address assignment and coding rules — Application infrastructure service providers (English PDF)

IPv6地址分配和编码规则　应用基础设施服务商

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 5, 2025

Implementation date

February 1, 2026

Scope

GB/T 46285-2025 is the English-translated version of IPv6地址分配和编码规则　应用基础设施服务商.

GB/T 46285-2025 is the Chinese national standard covering how a CDN or cloud provider carves up its IPv6 space — the prefix per site and per service, the anycast addressing, the encoding that keeps the routing announcements aggregated, and the records that make an address attributable. First edition, with the access provider standard GB/T 46332-2025. In force from 1 February 2026. Issued on 5 October 2025, it has been in force since 1 February 2026.

Document preview — GB/T 46285-2025

National Standard of the People's Republic of China

ICS: 33.040
Classification: L 78

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative References1
3 Terms and Definitions1
4 Abbreviations2
5 IPv6 address encoding format2
5.1 General Format2
5.2 Address Encoding Formats in Different Use Cases2
6 IPv6 address encoding methods4
6.1 General Requirements for IPv6 Address Encoding Methods4
6.2 IPv6 Address Type Identifier Encoding Method4
6.3 IPv6 Address Geographic Identifier Encoding Method4
6.4 IPv6 Address Subnet Space Identifier Encoding Method5
6.5 IPv6 Address Interface Identifier Encoding Method5
References6

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.

This document is under the jurisdiction of the National Telecommunications Standardization Technical Committee (SAC/TC485).

This document was drafted by: China Internet Network Information Center (CNNIC), China Academy of Information and Communications Technology (CAICT), Huawei Technologies Co., Ltd., and Alibaba Cloud Computing Co., Ltd.

Limited Liability Company, Tencent Cloud Computing (Beijing) Co., Ltd., Baidu Cloud Computing Technology (Beijing) Co., Ltd., Beijing GDS Holdings Co., Ltd.

Limited Liability Company, Wangsu Science & Technology Co., Ltd., Beijing Lianxing Technology Co., Ltd., University of Electronic Science and Technology of China, Guizhou University, Beijing Huahong Xin'an Technology Co., Ltd. Limited Liability Company.

The main drafters of this document are: Yang Xue, Shen Zhi, Wang Lidong, Wang Zhifeng, Li Xiang, Zhang Zifei, Wang Xuan, Ma Qing, Jia Li, Zhang Bowen, and Hou Zhiwen.

Zhou Xiangmei, Yu Zhen, Wang Xin, Zhao Jiangteng, Chen Qi, Wang Shaoshuai, Wang Wenyong, Zou Sai, Zhao Ming.

IPv6 address allocation and encoding rules Application infrastructure service providers

1 Scope

This document specifies the IPv6 address allocation and encoding rules for application infrastructure service providers.

This document applies to service providers offering application infrastructure services within China, including internet data centers, cloud service providers, and others.

Content delivery network service provider, domain name registration and resolution service provider.

2 Normative references

GB/T 45282-2025

3 Terms and Definitions

The terms and definitions defined in GB/T 45282-2025, as well as the following terms and definitions, apply to this document.

3.1 IPv6 address

A 128-bit identifier used to identify one or a group of IPv6 network interfaces.

[Source. GB/T 45282-2025, 3.1]

3.2

A series of consecutive bits in an IPv6 address are used to identify the address type in different scenarios.

3.3

A number of bits in an IPv6 address are used to identify geographical information such as province, city, district, and county.

3.4 datacenter

The computer facility (computer room), other infrastructure, information system hardware and software, information resources (data), personnel, and relevant regulations.

An entity composed of degrees.

[Source. GB/T 43331-2023, 3.1]

3.5 Internet Data Center

Equipped with comprehensive facilities (including high-speed internet access bandwidth, high-performance local area network, and a secure and reliable data center environment), we conduct internet...

Data center for network services.

[Source. GB/T 43331-2023, 3.2]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 45282-2025IPv6 address assignment and encoding rules — General requirements

Cited by

GB/T 46332-2025IPv6 address assignment and coding rules - Internet access service providers

Editions of GB/T 46285

Edition	Title	Revision	Status
GB/T 46285-2025	IPv6 address assignment and coding rules - Application infrastructure service providers	current edition	Current

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