Nielsen//NetRatings published a list of top Web advertisers in December 2006.
| Top Web advertisers in December 2006 | ||
| Advertiser | Budget | Impressions, 000 |
| Experian | $ 90,284,000 | 34,649,333 |
| AT&T | $ 39,857,400 | 10,535,951 |
| NexTag | $ 32,120,900 | 15,221,834 |
| Verizon | $ 31,759,200 | 8,962,028 |
| Time Warner Inc. | $ 27,288,500 | 6,948,177 |
| Vonage | $ 24,174,400 | 7,533,227 |
| Low Rate Source | $ 17,920,600 | 6,792,963 |
| Bank of America | $ 16,503,600 | 7,536,428 |
| Blockbuster | $ 16,056,700 | 7,309,783 |
| eBay | $ 15,566,900 | 2,606,156 |
| Source: Nielsen//NetRatings | ||