Data as of Nov 7, 2026
123.49.57.0/24
No anonymizer space · no proxy exits in 30 daysTelecom Operator & Internet Service Provider as well · space held by Bangladesh Telegraph & Telephone Board
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 123.49.0.0/18 since Nov 2006 | AS17494 | Residential | 104 10 always on | Bangladesh Telegraph & Telephone Board |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 123.49.0.0/18 | 16,384 | BTTB | Bangladesh Telegraph & Telephone Board (ORG-BTTB1-AP) · BD | ALLOCATED PORTABLE | — | irt@ |
| └ 123.49.48.0/20 | 4,096 | BTCL-DHAKA-ISP-Network | BTCL Dhaka ISP network address | ALLOCATED NON-PORTABLE | — | irt@ |
| └ 123.49.57.0/25 | 128 | PTISL | Peoples Telecommunication and Information Systems Ltd | ASSIGNED NON-PORTABLE | — | irt@ |
| └ 123.49.57.128/26 | 64 | TSN-ONLINE-BD | TSN Online BD. Internet Service Provider. | ASSIGNED NON-PORTABLE | — | irt@ |
| └ 123.49.57.192/28 | 16 | TRIANGLE-SERVICES | Triangle Services Ltd. Internet Service Provider. | ASSIGNED NON-PORTABLE | — | irt@ |
| └ 123.49.57.208/28 | 16 | EARTHLINK-CTG | Earth Link Ltd. Internet Service Provider. | ASSIGNED NON-PORTABLE | — | irt@ |
| └ 123.49.57.224/28 | 16 | ICT-INCUBATOR | ICT Incubator, Ministry of ICT | ASSIGNED NON-PORTABLE | — | irt@ |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
256 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Business | 240 | 94% | 5 | |
| Residential | 16 | 6.3% | 1 |
Network & registry
Registry
Holder
- Organization
- Bangladesh Telegraph & Telephone Board
- Handle
- ORG-BTTB1-AP
- Range
- 123.
49. 0. 0/ 18 - Registration type
- ALLOCATED PORTABLE
- Reallocated to
- BTCL Dhaka ISP network address
- Reallocated range
- 123.
49. 48. 0/ 20 - Reallocation type
- ALLOCATED NON-PORTABLE
Origin network
AS17494
BD
- Name
- Telecom Operator & Internet Service Provider as well
- Type
- Internet provider
- Registered
- Dec 7, 2000
- Domain
- btcl.gov.bd
- Website
- www.btcl.gov.bd/en
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jul 2023
- Current origin since
- Jul 2023 · 3.3 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 123.49.0.0/18 | AS17494 | /24 | APNIC | RPKI valid |
| 123.49.0.0/18 | AS45588 | /24 | APNIC | Another network |
Whois
Registration for this announcement
- Range
- 123.
49. 48. 0/ 20 - Netname
- BTCL-DHAKA-ISP-Network
- Registrant
- BTCL Dhaka ISP network address
- Registrant country
- BD
- Organization
- BTCL Dhaka ISP network address
- Org country
- BD
- Type
- ALLOCATED NON-PORTABLE
- Created
- Not stated by the registry
- Updated
- Jan 18, 2021
- Maintainer
- MAINT-BD-BTCLCLIENTBB
- RIR
- APNIC
- Country
- BD
- Delegated
- Sep 27, 2006
- Status
- assigned
Report abuse
Abuse contact
- irt@
btcl. gov. bd - Name
- ABUSE BTTBBD
- Handle
- AB1235-AP