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I was curious to see how much I could detect with an off the shelf setup (standard PCIe wifi card with an external 10cm antenna) running in my living room for a week. Here are the numbers so far:
Raw size: 2,077,031,816 bytes (2.0Gb) (14,991,993 lines of tcpdump data)
2019-09-11 22:21 to 2019-09-19 06:13 (approx 7 days, 7 hours and 52 minutes) 10,554 minutes
Unique MAC addresses seen: 68,298
MAC addresses seen only once at all | 25,318 |
MAC addresses seen 2-9 times | 37,436 |
MAC addresses seen 10-99 times | 4,917 |
MAC addresses seen 100-999 times | 399 |
MAC addresses seen 1,000-9,999 times | 119 |
MAC addresses seen 10,000-99,999 times | 74 |
MAC addresses seen 100,000-999,999 times | 42 |
MAC addresses seen 1million+ times | 4 |
MAC addresses seen 1-3 times | 65,555 |
MAC addresses seen 4-10 times | 1,585 |
MAC addresses seen 11-30 times | 572 |
MAC addresses seen 31-40 times | 87 |
MAC addresses seen 41-50 times | 51 |
MAC addresses seen 51-70 times | 64 |
MAC addresses seen 101-200 times | 86 |
MAC addresses seen 201-300 times | 26 |
MAC addresses seen 301-500 times | 40 |
MAC addresses seen 501-998 times | 40 |
MAC addresses seen 999+ times | 146 |