In the server leasing and cloud computing industry, "upstream and downstream" is a frequently used term. Whether you are considering entering the server resale field or are already operating a related business, understanding the essence of upstream and downstream relationships, the rights and responsibilities of each party, and how to accurately query upstream and downstream information are essential basic skills.

This article will systematically explain the complete picture of the upstream and downstream relationships in server resale.

I. What are the Upstream and Downstream in Server Resale?

The server resale industry chain can be clearly divided into three levels: upstream, midstream (resellers/agents), and downstream.

Upstream: Owners of Resources

Upstream are the first-tier service providers who own core hardware resources such as physical data centers, bandwidth, and IP addresses. They are usually telecom operators, large IDC service providers, or cloud infrastructure providers, responsible for building data centers, laying fiber optic networks, purchasing server equipment, and maintaining their normal operation.

The core assets of the upstream are physical resources—land and buildings, power supply, network bandwidth, IT equipment, cooling equipment, etc. The construction and maintenance of these resources require huge capital investment, therefore, the upstream has the strongest bargaining power in the entire industry chain.

Midstream: Resource Resellers

Midstream refers to resellers or agents. They don't own physical data centers or hardware; instead, they purchase server resources in bulk from upstream suppliers and then resell them to end customers after repackaging or breaking them down.

The core value of agents lies in service and integration—handling pre-sales selection, architecture consultation, and after-sales response, essentially earning information asymmetry and service premiums. Upstream suppliers provide "resources," while agents provide "solutions."

Downstream: Resource Users

Downstream users are the end users of server resources—enterprise users, individual developers, cross-border e-commerce sellers, etc. They don't care which data center the server is in or what network it uses; they only care about service stability, reasonable pricing, and someone to handle problems.

II. Powers and Responsibilities at Each Level

Having understood the hierarchical division, let's look at the specific powers and responsibilities of each party.

Upstream Powers and Responsibilities

Upstream Powers:

- Resource Pricing Power: Upstream companies control the pricing of core resources such as bandwidth, IP addresses, and server racks, significantly impacting the cost structure of the entire industry chain.

- Entry Barrier Setting Power: Upstream companies have the right to decide who to partner with and can screen agents through channel access approval systems.

- Resource Allocation Power: During periods of resource scarcity, upstream companies have the right to prioritize resource allocation to certain customers or agents.

Upstream Responsibilities:

- Instrument Guarantee: Ensuring the continuous and stable operation of data center infrastructure such as power, network, and cooling systems.

- SLA Fulfillment: Bearing responsibility for the provided bandwidth, availability, and other metrics according to Service Level Agreements (SLAs).

- Compliant Operation: Holding a Value-Added Telecommunications Business Operating License (IDC/ISP license) and operating legally and compliantly.

Midstream (Agents/Resellers) Powers and Responsibilities

Agent Powers:

- Independent Pricing Power: After purchasing resources from upstream companies, agents can independently set prices and resell them to downstream customers, earning the price difference.

- Brand Autonomy: Distributors can use their own brand to reach customers, who perceive them as independent service providers, not upstream "distributors."

- Customer Relationship Ownership: Customer resources belong to the distributor; upstream suppliers typically do not directly contact the distributor's end customers.

Distributor Responsibilities:

- Pre-sales Consultation and Solution Design: Helping customers choose suitable configurations and solutions.

- After-sales Technical Support: Responsible for daily maintenance, troubleshooting, and issue response.

- Service Quality Guarantee: Customers contact the distributor first when encountering problems; the distributor bears full responsibility for the service experience.

- Compliance Risk Assumption: Distributors may face administrative penalties if they resell servers without permission.

Downstream (End-User) Rights and Responsibilities

End-User Rights:

- Service Selection Right: The ability to choose different service providers and configuration plans.

- Service Quality Monitoring Right: The right to demand that service providers fulfill their SLA commitments.

- Data Ownership: Ownership of their own data.

End-user responsibilities:

- Payment on schedule: Pay service fees on time.

- Legal use: Do not use the server for illegal or irregular activities.

- Security obligations: Cooperate with the service provider to complete necessary security management and compliance requirements.

III. How to query upstream and downstream relationships?

In actual business, there are various scenarios for querying upstream and downstream relationships: confirming whether the service provider has "first-hand resources" before purchasing, verifying the other party's qualifications and background before cooperation, or understanding the real data center source behind a certain IP address. The following are some commonly used query methods.

Method 1: BGP.Tools — Querying upstream relationships at the IP level

BGP.Tools is currently the most commonly used IP information query tool. By entering an IP address, you can query the ASN (Autonomous System Number) to which the IP belongs, the geographical location of the data center, network peering information, etc.

Operation Steps:

1. Open the BGP.Tools website (bgp.tools)

2. Enter the target IP address in the search box

3. View the returned ASN information—ASN is a key identifier for upstream service providers.

How to Interpret the Results:

- If the ASN belongs to a large operator (e.g., China Telecom AS4134, China Unicom AS4837), it means the IP belongs to the operator's directly operated resources.

- If the ASN belongs to a small or medium-sized IDC service provider, that service provider may be the upstream resource provider.

- By viewing the "Upstream" field, you can further confirm the network hop to which the IP belongs.

Method Two: WHOIS Query—Tracing Domain and IP Registration Information

A WHOIS query can obtain the registration information of a domain or IP address, including the registrar, registrant, contact information, etc.

Commonly Used WHOIS Query Tools:

- ICANN WHOIS (whois.icann.org)

- DomainTools (whois.domaintools.com)

Important Notes:

A WHOIS query returns the name of the last company in the chain, not the complete upstream and downstream chain. In other words, it can tell you who currently manages the IP or domain name, but it may not tell you who is upstream.

Method 3: MIIT Filing Inquiry – Verifying Business Qualifications

For domestic server businesses, the MIIT filing system can be used to check the service provider's business qualifications.

Steps:

1. Access the MIIT ICP/IP Address/Domain Name Information Filing Management System (beian.miit.gov.cn)

2. Enter the service provider's name or filing number to query.

3. Verify whether it holds a Value-Added Telecommunications Business Operating License.

Why Check:

Agency businesses without proper qualifications carry significant risks. Legitimate IDC/ISP service providers should hold a Value-Added Telecommunications Business Operating License issued by the MIIT, which can be verified on the MIIT's official website.

Method 4: Traceroute/MTR – Network Path Tracing

By tracing the route from your local machine to the target server using tools like Traceroute or MTR, you can observe which network nodes the data packets passed through.

Steps:

1. Execute `traceroute targetIP` or `mtr targetIP` in your local terminal.

2. Observe the IP address attribution for each hop.

Interpretation:

- If a specific ASN (Application Service Provider) IP range appears frequently in the route, it indicates that the service provider corresponding to that ASN is a critical node on this link.

- By combining this with BGP.Tools to query the ASN information of each hop IP, you can gradually reconstruct the upstream and downstream relationships at the network layer.

Method 5: Certificate Transparency Log Query – Discovering the Underlying CDN or Proxy

For websites using CDNs or reverse proxies, directly tracing the IP address may not reveal the true origin server. In this case, you can query the Certificate Transparency logs.

Operation Steps:

1. Use your browser's developer tools to view the website's SSL certificate information.

2. Search for the domain name in a certificate transparency log platform (such as crt.sh).

3. View all certificates historically issued for this domain name; sometimes this can reveal the origin IP address or the service provider behind it.

# Method Six: Proactive Verification – Requesting Qualification Certificates

All the above technical methods have their limitations. The most direct and reliable method remains proactively requesting qualification certificates from your partner.

You should request the following from them:

- A copy of the Value-Added Telecommunications Business Operating License

- ICP filing number and screenshot of the Ministry of Industry and Information Technology's query

- Proof of self-operated data center (data center address, on-site photos or video verification)

- Authorization letter or cooperation agreement from the upstream supplier (if applicable)

IV. Two Special Forms of Upstream and Downstream Relationships

In the server resale field, upstream and downstream relationships are not limited to "resource resale." Depending on the actual business model, two special cases warrant attention:

First: Pure Distribution Relationship

The agent leases IP and bandwidth resources from the upstream provider but does not own any IP resources themselves. In this case, the agent is merely a distribution channel for the upstream provider, and all resources ultimately belong to the upstream provider. The upstream ASN is always visible in the end-user's traffic path.

Second: BGP Routing Relationship

The agent owns its own IP addresses (with its own ASN and IP range), but points the next hop of the IP to the upstream provider, which then helps advertise the route or initiate BGP routing. In this case, from a routing perspective, the agent's IP "next hop" is the upstream provider, and the two constitute upstream and downstream in terms of routing relationships.

In this model, the agent has greater autonomy—the IP resources belong to them, and they only broadcast using the upstream network infrastructure. However, for end-users, when querying through BGP.Tools, they may see the agent's ASN, not the upstream provider's ASN. Route tracing is required to see the complete upstream and downstream chain.

V. Practical Application Scenarios of Upstream and Downstream Queries

Scenario 1: Verifying Service Provider Background Before Purchase

Before purchasing a server, use BGP.Tools to query the ASN of the target IP to confirm whether the service provider truly owns its own data center or is merely a multi-layered reseller.

Scenario 2: Troubleshooting Network Issues

When network anomalies occur, using MTR and BGP.Tools together can quickly pinpoint the problem's location—whether it's at the domestic operator's exit point, the upstream backbone network, or the service provider's own data center.

Scenario 3: Choosing a Reseller

If you are considering becoming a reseller, be sure to verify the upstream service provider's qualifications—whether they hold a value-added telecommunications business operating license, have their own data center, and possess stable resource supply capabilities.

There are various methods to check upstream and downstream relationships—using BGP.Tools to view ASNs, WHOIS to check registration information, MIIT filing to verify qualifications, Traceroute to trace routing paths—each method has its applicable scenarios and limitations. Technical means can only provide reference; the most reliable verification method is still requiring partners to provide complete qualification certificates.

Jtti, as a service provider deeply rooted in the overseas cloud server market, possesses formal operating qualifications and self-operated data center resources. Whether you are looking for reliable cloud server products or hoping to understand agency cooperation opportunities, Jtti provides a transparent and verifiable cooperation model.