Prefix overview
Prefix 81: numbering blocks and phone lookup
The prefix 81 is part of the India mobile numbering structure. This page helps you explore all known numbering blocks associated with this prefix, including operator references, telecom regions and available phone number ranges.
From here, you can move into more specific 5-digit numbering blocks, which provide a more precise view of how numbers are allocated inside this prefix.
If you are investigating a specific number, the next step is to open the relevant block or go directly to the phone page.
PREFIX
81
RANGES
36
OPERATORS
12
Numbering blocks
36 blocks
These blocks represent more precise number allocations inside prefix 81.
Block
Operator
Region
81000
RTL(GSM)
Kolkata
81010
RTL(GSM)
West Bengal
81020
RTL(GSM)
Bihar
81030
RTL(GSM)
Madhya Pradesh
81040
Sistema Shyam TeleServices Ltd.(CDMA)
Rajasthan
81050
Bharti Airtel Limited
Karnataka
81060
Bharti Airtel Limited
Andhra Pradesh
81070
Bharti Hexacom Ltd.
Rajasthan
81080
Idea Cellular Ltd.
Mumbai
81090
TTSL(GSM)
Madhya Pradesh
81150
Unitech Wireless (East) Pvt. Ltd.
Uttar Pradesh
81160
Bharti Airtel Limited
West Bengal
81200
Idea Cellular Ltd.
Madhya Pradesh
81210
TTSL(GSM)
Andhra Pradesh
81220
TTSL(GSM)
Tamil Nadu
81230
TTSL(GSM)
Karnataka
81240
Idea Cellular Ltd.
Tamil Nadu
81250
TTSL(GSM)
Andhra Pradesh
81260
Bharti Airtel Limited
Uttar Pradesh
81270
Bharti Airtel Limited
Uttar Pradesh
81280
Bharti Airtel Limited
Gujarat
81290
Bharti Airtel Limited
Kerala
81300
Bharti Airtel Limited
Delhi
81400
Idea Cellular Ltd.
Gujarat
81410
Vodafone Essar Gujarat Ltd.
Gujarat
81420
Vodafone Essar south Ltd.
Andhra Pradesh
81430
TTSL(GSM)
Andhra Pradesh
81440
RCL(GSM)
Tamil Nadu
81450
Vodafone Essar South Ltd.
West Bengal
81460
Bharti Airtel Limited
Punjab
81470
TTSL(GSM)
Karnataka
81480
TTSL(GSM)
Tamil Nadu
81490
TTML(GSM)
Maharashtra
81710
Bharti Airtel Limited
Uttar Pradesh
81790
Bharti Airtel Limited
Andhra Pradesh
81970
Bharti Airtel Limited
Karnataka