# HLR lookup vs MNP — what's the difference?

> An HLR lookup and MNP are two sides of number intelligence: an HLR (Home Location Register) lookup queries a mobile network over SS7 to confirm whether a number is live and which operator now serves it, while MNP (mobile number portability) is the rule that lets subscribers keep their number when switching operator. Because ported numbers break the old prefix-to-operator mapping, an HLR lookup is how you find a number's real current network.

- Canonical URL: https://www.broadnet.me/answers/hlr-vs-mnp
- Language: en
- Last reviewed: 2026-07-30
- Publisher: BroadNet (https://www.broadnet.me)

## What an HLR lookup does

An HLR lookup sends an SS7 MAP Send-Routing-Info-for-SM query toward the number's home network and reads back the record: whether the MSISDN is a valid, active subscriber, whether it is currently reachable or roaming, and which operator (MCC/MNC) serves it right now. It is a real-time question — 'is this number good, and where does it live?' — answered by the network itself, not a static database.

- An SS7 MAP query against the number's home register.
- Returns active/inactive, reachable/roaming, and current operator.
- Real-time and network-authoritative, not a guess from the prefix.
- Used to clean lists and route correctly before you send.

## What MNP is, and why it breaks prefix routing

Mobile number portability is a regulatory right, not a query: subscribers can move to a new operator and keep their number. That convenience destroys the old assumption that a number's prefix (its number range) tells you the operator. After a port, a number that 'looks like' operator A is actually served by operator B. Route or price by prefix alone and you will send to the wrong network — over-paying, mis-routing, or failing delivery.

- MNP is a regulation letting subscribers keep their number.
- It breaks the prefix-to-operator mapping routing once relied on.
- A ported number's prefix no longer identifies its real network.
- Common across MENA, Europe, and most modern markets.

## How they work together

MNP creates the problem; the HLR lookup solves it. Because you can no longer trust the prefix, you run an HLR lookup to discover the true current operator — including the ported status — before you route or bill a message. That is why number-intelligence products bundle both: HLR for live status and MNP resolution so every message goes to the network that actually holds the subscriber, at the right rate.

- MNP is the reason prefix routing is no longer safe.
- The HLR lookup returns the real, post-port operator.
- Validate before sending to avoid mis-routing and over-billing.
- See BroadNet HLR Lookup for real-time MSISDN validation.

## HLR lookup vs MNP at a glance

|  | HLR lookup | MNP |
|---|---|---|
| What it is | A real-time network query | A regulatory right / framework |
| Answers | Is it live, and who serves it now? | Can a subscriber keep their number? |
| Mechanism | SS7 MAP SRI-SM query | Regulated porting between operators |
| Output | Operator, active status, roaming, ported flag | A number that no longer matches its prefix |
| Why you care | Validate and route correctly before sending | Prefix routing is no longer reliable |

## Frequently asked questions

### Does an HLR lookup tell me if a number has been ported?

Yes. The lookup returns the operator that actually serves the number now, which reflects any MNP port — so it detects ported numbers and gives you the correct current network.

### Is MNP something I can query?

MNP itself is a regulation, not an API. What you query is the resulting state — the number's current operator — via an HLR lookup or a dedicated MNP database, which resolves where a ported number really lives.

### Why not just route by the number's prefix?

Because MNP means the prefix can lie. A number that starts like operator A may have ported to operator B. Routing or pricing by prefix alone causes mis-delivery and wrong billing; an HLR lookup gives you the truth.

## Related

- [What is HLR lookup?](https://www.broadnet.me/answers/what-is-hlr-lookup)
- [What is MNP?](https://www.broadnet.me/answers/what-is-mnp)
- [SS7 MAP explained](https://www.broadnet.me/answers/ss7-map-explained)
- [What is an HLR?](https://www.broadnet.me/answers/what-is-hlr)
- [All answers](https://www.broadnet.me/answers)
- [What is HLR Lookup?](https://www.broadnet.me/answers/what-is-hlr-lookup)
- [What is MNP (Mobile Number Portability)?](https://www.broadnet.me/answers/what-is-mnp)
- [SS7 MAP — what it is and why messaging still depends on it](https://www.broadnet.me/answers/ss7-map-explained)
- [What is an HLR (Home Location Register)?](https://www.broadnet.me/answers/what-is-hlr)
- [How does HLR lookup and MNP number intelligence work?](https://www.broadnet.me/answers/hlr-mnp-number-intelligence)
- [HLR Lookup](https://www.broadnet.me/products/hlr-lookup)