What is an Autonomous System Number?
An ASN identifies an autonomous system that announces groups of IP prefixes through internet routing. It describes network-level routing responsibility, not an individual subscriber. IPRout returns the numeric ASN with organization and location fields in the same lookup, allowing applications to understand both where an address appears to be and which network announces it without coordinating two separate API products.
How can ASN data be used?
Operations teams can group traffic by network, support teams can add provider context to connection reports, and analytics systems can compare behavior across access networks, hosting providers, or cloud platforms. Security workflows can use ASN as one input when reviewing unusual activity. It is most useful when combined with request history and other evidence rather than converted into a universal allowlist or blocklist.
What does organization mean beside ASN?
The organization field names the network owner or operator associated with the routing record. It may be an ISP, mobile carrier, university, enterprise, cloud provider, or other network organization. It is not necessarily the employer, website, or identity of the person using the address. Display it as network context and avoid language that implies the API has identified an individual user.
What routing limitations should developers expect?
Addresses can move between networks, announcements can change, and some organizations use transit or cloud infrastructure whose name differs from the customer-facing service. Shared and anycast infrastructure can also make simplistic classifications unreliable. Keep network policy reviewable, monitor false positives, and avoid permanent account decisions based solely on one ASN. Re-run lookups when the current routing context matters.
How do I look up an ASN?
Use either public lookup route; ASN is already part of the standard response. The explicit example returns ASN 15169 and organization Google LLC for 8.8.8.8. Parse asn as a nullable integer and organization as a nullable string, and inspect the HTTP status before treating the body as a successful network record.
curl --fail-with-body --max-time 10 \
-H "Authorization: Bearer $IPROUT_API_KEY" \
https://api.iprout.com/ip/8.8.8.8How should ASN enrichment operate at scale?
Use named service keys to attribute lookup volume, bound worker concurrency, and monitor GET /usage against the shared account quota. Cache only when compatible with the required routing freshness. Keep raw credentials out of logs and exported analytics. When using ASN for risk context, store the policy reason and supporting signals so later reviews can explain and adjust the decision.
Which IPRout plan fits this workload?
Use the 7-Day Developer Key for a short evaluation with 1,000 requests. Free supports ongoing low-volume use with 10,000 monthly requests and 1 active key. Starter adds 100,000 requests, 2 active keys, and up to 5 exact CORS origins per key. Pro provides 1,000,000 requests, 5 active keys, up to 10 origins per key, and a configurable 100 to 1,000,000 request cap when each key is created. All active account keys consume one shared monthly allowance.
| Plan | Monthly requests | Active keys |
|---|---|---|
| Free | 10,000 | 1 |
| Starter | 100,000 | 2 |
| Pro | 1,000,000 | 5 |
What are the key benefits?
This feature uses the same authenticated HTTPS interface and predictable JSON conventions as the rest of IPRout. That keeps the integration small while letting teams separate product logic from the details of IP intelligence and API key controls.
- Network-level analytics
- Traffic source context
- One request with GeoIP data
How do I get started?
Generate a 7-Day Developer Key for evaluation or create an account key for an ongoing integration. Begin with the documented request, add status-aware error handling and a finite timeout, then connect only the response fields your product needs. Review usage before launch, keep the secret in trusted infrastructure, and follow the linked documentation for feature-specific configuration.