I don't have anything for this season, but the Boston Celtics had a record of 21-6 after the All-Star Game in 2023-24.

Interpreted as:

NBA teams record since all star break this season

	TEAM	REC	SEASON	W%	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF
1	Celtics	21-6	2023-24	.778	27	240.9	120.4	44.3	28.3	7.7	6.7	44.8	90.0	49.8	17.0	42.0	40.4	13.8	17.2	80.2	61.7	10.7	33.6	10.0	6,505	3,250	1,197	765	207	181	271	388
2	Knicks	17-10	2023-24	.630	27	241.9	109.3	43.8	25.8	7.8	4.6	40.5	87.6	46.2	13.7	37.0	37.0	14.7	19.2	76.4	56.9	12.6	31.2	12.0	6,530	2,952	1,182	697	210	123	325	453
3	Warriors	19-10	2023-24	.655	29	240.0	114.2	46.8	29.9	7.6	5.4	43.8	91.2	48.1	14.1	37.4	37.7	12.4	16.3	76.1	58.0	11.7	35.1	13.5	6,960	3,311	1,358	866	219	158	392	507
4	Pistons	6-22	2023-24	.214	28	240.0	104.1	42.6	23.5	7.4	4.4	38.3	85.7	44.7	10.8	33.0	32.8	16.7	20.9	80.1	54.9	9.0	33.6	14.2	6,720	2,915	1,193	658	206	122	397	499
5	Lakers	17-9	2023-24	.654	26	242.9	120.3	44.0	28.6	6.3	5.3	44.6	87.6	50.9	12.8	32.8	39.1	18.3	23.0	79.6	61.6	8.3	35.7	13.7	6,315	3,127	1,144	744	165	137	355	372
6	Kings	15-13	2023-24	.536	28	241.8	113.0	45.4	27.8	8.4	4.6	42.3	91.0	46.5	13.6	37.9	35.8	14.8	19.1	77.4	56.9	11.9	33.5	12.0	6,770	3,164	1,271	777	236	128	336	543
7	76ers	15-13	2023-24	.536	28	241.8	107.4	42.5	24.9	8.2	6.4	39.6	89.0	44.4	13.6	36.8	36.9	14.7	17.9	81.9	55.4	10.9	31.6	11.3	6,770	3,007	1,190	697	229	178	315	544
8	Hawks	12-15	2023-24	.444	27	242.8	112.2	44.2	27.3	7.4	4.5	41.9	90.4	46.4	13.7	36.9	37.1	14.7	19.4	75.8	56.7	11.4	32.8	12.8	6,555	3,030	1,193	738	199	122	345	485
9	Wizards	6-22	2023-24	.214	28	241.8	111.8	41.7	27.5	7.3	4.4	42.3	91.5	46.2	12.8	37.3	34.4	14.3	18.9	75.5	56.0	9.2	32.5	13.6	6,770	3,129	1,168	770	204	122	381	547
10	Bulls	13-14	2023-24	.481	27	243.7	113.2	44.6	26.3	8.0	3.9	42.8	90.2	47.5	10.9	30.9	35.1	16.7	21.1	79.2	56.9	11.5	33.1	11.5	6,580	3,057	1,203	709	215	106	310	480
11	Spurs	11-16	2023-24	.407	27	243.7	112.7	46.3	31.0	6.8	6.9	42.1	89.8	46.9	13.2	36.2	36.4	15.3	19.7	78.0	57.2	10.7	35.7	15.2	6,580	3,042	1,251	837	184	186	410	429
12	Nuggets	21-6	2023-24	.778	27	240.9	116.7	45.1	31.1	7.9	6.1	45.3	88.7	51.0	12.1	31.4	38.6	14.1	18.2	77.4	60.3	10.0	35.1	11.9	6,505	3,151	1,218	839	214	164	322	471
13	Pacers	16-10	2023-24	.615	26	241.0	122.4	43.4	30.5	7.5	5.9	47.4	93.7	50.6	12.3	34.2	35.9	15.3	19.2	79.4	59.9	10.3	33.2	10.8	6,265	3,182	1,129	792	196	154	282	527
14	Nets	11-17	2023-24	.393	28	241.8	104.6	43.3	23.4	6.6	4.8	38.5	85.9	44.8	12.2	35.1	34.8	15.5	20.6	74.9	55.1	11.0	32.4	13.3	6,770	2,929	1,213	654	186	135	373	483
15	Rockets	17-11	2023-24	.607	28	241.8	116.3	45.0	24.8	8.4	4.9	42.2	92.8	45.4	14.1	40.0	35.3	17.8	22.9	77.7	56.5	12.3	32.7	11.8	6,770	3,255	1,259	695	234	138	330	545
16	Thunder	20-8	2023-24	.714	28	240.9	118.7	43.9	26.8	9.1	6.4	44.6	89.9	49.6	13.2	34.6	38.0	16.4	20.2	81.1	60.1	9.2	34.7	12.3	6,745	3,323	1,230	751	255	178	344	490
17	Bucks	14-12	2023-24	.538	26	241.9	112.4	44.5	26.1	6.6	4.7	41.2	86.9	47.3	14.2	38.5	36.8	16.0	20.3	78.6	58.6	9.5	35.0	12.2	6,290	2,923	1,157	679	171	122	317	450
18	Suns	16-11	2023-24	.593	27	240.9	113.5	45.8	27.6	7.2	5.9	42.0	87.3	48.2	13.6	34.9	38.8	15.9	19.7	80.5	59.1	10.9	34.9	14.1	6,505	3,064	1,236	745	194	158	381	458
19	Clippers	15-14	2023-24	.517	29	240.0	110.8	43.0	24.8	7.4	4.7	41.1	85.7	47.9	11.7	32.9	35.6	16.9	20.0	84.5	58.6	9.8	33.2	12.4	6,960	3,213	1,246	718	216	136	361	500
20	Cavaliers	12-17	2023-24	.414	29	242.6	108.5	40.2	29.4	6.9	4.4	39.9	84.5	47.3	13.8	36.3	37.9	14.9	19.8	75.1	58.2	8.2	32.0	12.8	7,035	3,147	1,166	854	201	128	371	452
21	Trail Blazers	6-22	2023-24	.214	28	241.8	103.5	45.4	24.0	7.5	3.9	39.6	90.6	43.7	10.8	32.8	32.9	13.5	17.4	77.8	52.6	14.1	31.3	15.1	6,770	2,897	1,271	671	209	108	423	547
22	Jazz	5-21	2023-24	.192	26	240.0	110.5	42.8	24.7	6.2	4.7	40.2	87.7	45.8	12.1	35.1	34.4	18.1	21.3	84.8	56.9	10.8	32.0	14.7	6,240	2,874	1,114	641	161	123	381	443
23	Mavericks	18-9	2023-24	.667	27	240.9	116.2	44.4	25.9	7.4	5.9	43.4	89.4	48.6	13.7	38.0	36.2	15.6	20.4	76.5	59.1	9.4	35.0	12.2	6,505	3,138	1,198	699	200	159	330	459
24	Pelicans	16-11	2023-24	.593	27	240.0	112.3	43.4	26.7	8.2	4.2	41.6	86.5	48.1	13.3	33.7	39.3	15.7	20.0	78.6	58.9	9.3	34.1	12.0	6,480	3,031	1,173	721	222	114	325	454
25	Heat	16-11	2023-24	.593	27	241.9	109.3	42.4	25.5	7.9	4.0	40.1	85.3	47.0	12.5	34.2	36.6	16.5	20.5	80.7	57.9	8.7	33.7	11.0	6,530	2,950	1,145	689	214	107	298	420