LRN Lookup Latency Comparison
Not all LRN APIs are equal in speed. Here's how SIPSmart's distributed U.S. NPAC-direct infrastructure compares to typical reseller and legacy SS7 gateway approaches.
| Provider | P50 Latency | P95 Latency | P99 Latency | Data Source |
|---|---|---|---|---|
| SIPSmart (Distributed U.S.)SIPSmart | 3ms | 7ms | 9ms | NPAC-Direct |
| Provider B (Tier-1 Reseller) | 18ms | 45ms | 80ms | Reseller |
| Provider C (National Carrier API) | 25ms | 65ms | 120ms | Internal |
| Provider D (Legacy SS7 Gateway) | 55ms | 120ms | 220ms | SS7 Bridge |
* Competitor figures based on available benchmark data and customer reports. Verify independently.
What Drives Latency Differences?
LRN lookup latency is primarily determined by three factors:
- Data source tier — NPAC-direct providers eliminate reseller hops
- Geographic proximity — Network distance between your servers and the LRN API
- Caching infrastructure — Redis-cached hot numbers vs. disk I/O for every query
Legacy SS7 gateways add translation overhead. Reseller chains add round-trip network hops. SIPSmart eliminates both with direct NPAC connectivity and Redis caching from a nationally distributed infrastructure across the United States.
Test Before You Commit
Run a real latency test against our API from your infrastructure. No account needed.
- Benchmark measurements reflect median observed performance across multiple testing periods from AWS us-east-1 (Virginia) to each provider's API endpoint. Numbers for competitors are based on customer-reported data and publicly available provider benchmarks. Results may vary by geography and traffic conditions. We encourage you to run your own tests.
- Yes. Use our public test endpoint:
curl -w " %{time_total}" https://api.sipsmart.io/v1/lrn/test. The response includes full timing breakdown. No account required. Run it from your own network for the most accurate benchmark relative to your infrastructure. - Three reasons: (1) NPAC-direct connectivity eliminates one or more reseller hops, (2) distributed U.S. replication nodes reduce physical network distance from your infrastructure to the nearest node, (3) multi-tier Redis caching serves hot numbers from memory at sub-millisecond speeds.
The Fastest LRN API. Verified.
Distributed U.S. NPAC-direct infrastructure. Sub-10ms P99. Test it yourself — no account required.
1,000 free lookups included • No credit card required • Instant provisioning