Autonomous Systems are networks typically governed by large ISPs that participate in global Internet routing. Each network is assigned a unique identification number known as the AS number or ASN by the Internet Assigned Numbers Authority.
| ASN | 1838 |
|---|
| Name | CERFNET-2 |
|---|
| Organization | AT&T Enterprises, LLC |
|---|
| Registry | ARIN |
|---|
| IPv4 addresses | 0 |
|---|
| IPv6 /64 networks | 0 |
|---|
| Prefixes | 0 |
|---|
Other ASN allocated to AT&T Enterprises, LLC
| ASN |
Name |
IP addresses |
| 7018 |
ATT-INTERNET4 |
110,463,745 |
| 20057 |
ATT-MOBILITY-LLC-AS20057 |
7,553,024 |
| 6389 |
BELLSOUTH-NET-BLK |
5,770,752 |
| 14654 |
WAYPORT |
1,973,504 |
| 7287 |
PBI-NET-BLK2 |
448,768 |
| 19957 |
STATE-OF-TENNESSEE-NETTN |
408,064 |
| 6431 |
ATT-RESEARCH |
398,848 |
| 2386 |
INS-AS |
313,600 |
| 4185 |
ATTIS-ASN4185 |
201,472 |
| 4473 |
ATTIS-ASN4473 |
144,896 |
| 13979 |
ATT-IPFR |
83,972 |
| 25993 |
ATT-LABS-AUSTIN-TX |
50,688 |
| 4466 |
EASYLINK2 |
30,208 |
| 13965 |
SBCIS-FYTVAR |
4,096 |
| 3423 |
ATTIS-ASN3423 |
3,328 |
| 4468 |
EASYLINK4 |
1,536 |
| 5728 |
WORLDNET1 |
512 |
| 16961 |
HIPCS-DALLAS-SERVER-OFFICE |
512 |
| 4186 |
ATTIS-ASN4186 |
256 |
| 6269 |
ATT-INTERNET2 |
256 |
| 14247 |
SBIS-WACOTX |
0 |
| 7294 |
SBIS-BLK |
0 |
| 13964 |
SBCIS-TPKAKS |
0 |
| 11026 |
ATTIS-ASN11026 |
0 |
| 27522 |
ATT-MOBILITY-LLC-AS27522 |
0 |
| 13422 |
SBCIS-BUMTTX |
0 |
| 16962 |
HIPCS-IRVINE-ACCESS-OFFICE |
0 |
| 46164 |
ATT-MOBILITY-LABS |
0 |
| 13420 |
SBCIS-LUBKTX |
0 |
| 19956 |
STATE-OF-TENNESSEE-NETTN |
0 |
| 17258 |
ATT-MOBILITY-LLC-AS17258 |
0 |
| 19540 |
ATT-MOBILITY-LLC-AS19540 |
0 |
| 16967 |
SBCIDC-DLLSTX |
0 |
| 16966 |
SBCIDC-LSAN03 |
0 |
| 16965 |
SBIS-SPFDMO |
0 |
| 16964 |
HIPCS-NEW-YORK-ACCESS-OFFICE |
0 |
| 16963 |
HIPCS-SOUTHFIELD-ACCESS-OFFICE |
0 |
| 16959 |
SBIS-AMRLTX |
0 |
| 16572 |
ATT-MOBILITY-LLC-AS16572 |
0 |
| 16473 |
STATE-OF-TENNESSEE-NETTN |
0 |
| 13421 |
SBCIS-ABLNTX |
0 |
| 7286 |
PBI-NET-BLK2 |
0 |
| 5104 |
ATTIS-ASN5104 |
0 |
| 5103 |
ATTIS-ASN5103 |
0 |
| 5102 |
ATTIS-ASN5102 |
0 |
| 5002 |
BBSATLGA |
0 |
| 4990 |
ATTIS-ASN4990 |
0 |
| 4467 |
EASYLINK3 |
0 |
| 4465 |
EASYLINK1 |
0 |
| 1698 |
PRODIGY |
0 |
| 3448 |
ATTMO-3-AS |
0 |
| 3422 |
ATTIS-ASN3422 |
0 |
| 3421 |
ATTIS-ASN3421 |
0 |
| 3420 |
ATTIS-ASN3420 |
0 |
| 5105 |
ATTIS-ASN5105 |
0 |
| 5107 |
ATTIS-ASN5107 |
0 |
| 7222 |
SBIS-KCSYMO |
0 |
| 7132 |
SBIS-AS |
0 |
| 6478 |
ATT-INTERNET3 |
0 |
| 5731 |
5731 |
0 |
| 6385 |
BELLSOUTH-NET-BLK |
0 |
| 6384 |
BELLSOUTH-NET-BLK |
0 |
| 6383 |
BELLSOUTH-NET-BLK |
0 |
| 6382 |
BELLSOUTH-NET-BLK |
0 |
| 6381 |
BELLSOUTH-NET-BLK |
0 |
| 5730 |
WORLDNET3 |
0 |
| 5729 |
WORLDNET2 |
0 |
| 5727 |
WORLDNET-0 |
0 |
| 1740 |
CERFNET |
0 |