# Query the HLR. Know who owns the number.

- Canonical URL: https://www.broadnet.me/operators/hlr-lookup
- Language: en
- Publisher: BroadNet (https://www.broadnet.me)
- Markdown version of the page above, generated from the rendered page.

HLR Lookup · MAP SRI-SM · S6a

An HLR lookup asks a mobile number's home network whether the number is live, which network serves it and whether it is roaming. BroadNet HLR Lookup gives operators and messaging platforms that answer straight from the destination network.

MAP SRI-SM and S6a against the destination operator — directly.

HLR Lookup runs live MAP SRI-SM (2G/3G) and Diameter S6a (LTE/5G) queries against the destination network. The response returns the serving MCC/MNC, IMSI, roaming status, and last-known reachability — giving operators and platforms the ground truth before they spend money routing or messaging the number.

[Request HLR API access](https://www.broadnet.me/operators/contact) [Compare with Number Lookup](https://www.broadnet.me/operators/number-lookup)

MAP SRI-SM · S6a Direct GT peering GSMA Associate Member

MAP SRI-SM transaction · sample

MAP SRI-SM · p99 350ms

Origin SMSC

operator A

BroadNet STP

DXB · FRA · SIN

Destination HLR

operator B

1 SRI-SM Request Origin SMSC → BroadNet STP

0ms

2 SRI-SM → MAP BroadNet STP → Destination HLR

+88ms

3 IMSI · Serving-MSC Destination HLR → BroadNet STP

+201ms

4 SRI-SM ack BroadNet STP → Origin SMSC

+288ms

IMSI

424021100…

MCC / MNC

424 / 02

REACHABLE

YES · 0.98

Capabilities

## Operator-grade HLR, not a scraping service.

BroadNet operates direct SS7 and Diameter peering over 1,000+ direct operator connections. HLR Lookup is the productised API on top of that signalling footprint — every query terminates at the real destination HLR / HSS.

### MAP SRI-SM (2G/3G)

Send Routing Information for SM against the destination HLR. Returns IMSI, serving MSC, and message-waiting status. Cleaned through the firewall first.

SRI-SM IMSI Serving MSC

### Diameter S6a (LTE/5G)

Insert-Subscriber-Data, Update-Location, and Cancel-Location traces against the destination HSS. Native 4G / 5G reachability ground truth.

ULR ISD CLR

### Reachability scoring

Combines HLR response, last-known roaming country, and historical delivery rates into a 0–1 reachability score per MSISDN.

0.0–1.0 score Per-MSISDN Updated on activity

### SIM swap signal

Detect changes in IMSI or serving network between lookups. Surface a webhook to bank and OTP partners before authorising sensitive actions.

IMSI delta Webhook Bank-grade

### Compliance-first

MSISDN hashing, per-tenant key isolation, regulator allow/deny lists, full audit trail. Compatible with GDPR, GCC privacy laws, and India's DPDPA.

Hashed at rest Per-tenant Audit trail

### Low-latency PoPs

Active PoPs in Dubai, Frankfurt, Singapore, and São Paulo. Lookups terminate at the regionally-nearest signalling gateway.

Dubai · Frankfurt Singapore · SP Anycast

Outcomes

## Why operators put HLR Lookup in front of every SMSC.

Pre-validating with HLR removes the cheapest source of A2P waste — sending to numbers that don't answer. Operators see measurable uplift in delivery rates and a fall in commercial-dispute volume within weeks.

Direct peerings

1,000+

SS7 + Diameter signalling reach

p99 end-to-end

350ms

Lookup + network round-trip

Dead numbers filtered

Pre-send

Unreachable numbers removed before you pay to send

SLA target

99.99%

24/7 MENA NOC, operator-grade

Compliance & certification

## Signalling we own. Compliance we audit.

GSMA Associate Member

### Direct signalling membership

Direct SS7 / Diameter peering over 1,000+ direct operator connections — not a reseller of someone else's HLR feed.

GDPR · DPDPA

### Privacy by design

MSISDNs hashed at rest, per-tenant key isolation, configurable regulator allow/deny lists.

ISO 27001 · SOC 2

### Operational security

ISO 27001-certified infrastructure with SOC 2 Type II controls, audited annually.

GSMA Associate Member ISO 27001 ISO 9001 ISO 22301 SOC 2 GDPR MEF

Related for operators

## Other carrier-side products in this stack.

[All operator products](https://www.broadnet.me/operators)

[Number Lookup HLR / MNP / portability lookup across 200+ countries. Explore](https://www.broadnet.me/operators/number-lookup) [SMS Firewall Block grey routes, smishing and sender-ID spoofing at line rate. Explore](https://www.broadnet.me/operators/sms-firewall) [Signaling Firewall SS7 + Diameter inspection. GSMA FS.11 Cat 1/2/3 categorization. Explore](https://www.broadnet.me/operators/ss7-firewall) [SMSC Gateway Carrier-grade SMSC — SMPP 3.4/5.0, SS7 MAP, Diameter, HTTP. Explore](https://www.broadnet.me/operators/smsc-gateway)

Direct to carrier engineering

## Talk to carrier engineering.

A 30-minute working session with the engineers who deploy this gear at Tier-1 operators. Bring your traffic map, your last quarter’s A2P P&L, and the route you’re worried about — we will tell you where the leak is.

[Book the working session](https://www.broadnet.me/operators/contact) [Browse operator catalogue](https://www.broadnet.me/operators)

$ ssh carrier-eng@broadnet.me — ref:hlr-lookup