Find Cell Number Carrier

#!/bin/bash

# Find the carrier for a cell number using whitepages

# Miki Tebeka <miki@mikitebeka.com>

if [ $# -ne 1 ]; then
    echo "usage: $(basename $0) NUMBER"
    exit 1
fi

# Fake Firefox
agent="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) "
agent="$agent Gecko/20061204 Firefox/2.0.0.1"

url="http://www.whitepages.com/carrier_lookup?"
url="${url}carrier=other&number_0=${1}&name_1=&number_1=&name_2=&number_2="
url="${url}&name_3=&number_3=&response=1"

curl -A "$agent" -L -s "$url" | \
    grep -A1 carrier_result | tail -1 | \
    sed -e 's/.*(\(.*\))/\1/' -e 's/^ \+//'