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Can ISPs learn customers ADSL modem brand by any means?

milesh
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    Given you've said "any means", if nothing else, they could have a highly trained team of hitmen and assassins break into your house to take a look at it. – ceejayoz Apr 11 '13 at 14:08
  • That's a valid answer if there is any other. – milesh Apr 11 '13 at 14:14

2 Answers2

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They can get a good idea if they care enough to look. They can see your modem's mac address, which if not changed leads them to the manufacturer.

Unfundednut
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It wouldn't be very difficult. They'll know the MAC address of the modem and since each manufacturer has their own unique OUI it would be a trivial matter to match your modem MAC address to the manfufacturer of the modem.

joeqwerty
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