Nielsen//NetRatings published a list of top Web advertisers in January 2007.
| Top Web advertisers in January 2006 | ||
| Advertiser | Estimated budget | Impressions, 000 |
| Experian | $113,114,300 | 42,978,680 |
| NexTag, Inc. | $40,159,000 | 20,596,355 |
| AT&T Corp. | $29,652,400 | 7,483,086 |
| Netflix, Inc. | $24,446,200 | 5,959,163 |
| Monster | $21,415,000 | 4,372,144 |
| Verizon | $18,941,400 | 5,515,209 |
| Apollo Group | $16,531,400 | 6,180,402 |
| United Online | $15,431,400 | 3,995,226 |
| Reunion.com | $14,669,500 | 9,078,957 |
| Low Rate Source | $14,491,500 | 4,274,009 |
| Source: Nielsen//NetRatings | ||