Upstream Adjacent AS list AS2828 XO-AS15 - XO Communications AS3356 LEVEL3 Level 3 Communications AS6461 MFNX MFN - Metromedia Fiber Network AS209 ASN-QWEST - Qwest Communications Company, LLC AS3549 GBLX Global Crossing Ltd. Downstream Adjacent AS list AS21524 PB - Parsons Brinckerhoff Inc. AS14600 MXL-PROD - MX Logic, Inc. AS40481 G3-ASN-1 - G3 Group AS7944 DMVOL-ASN - DELMARVA ONLINE